diff --git a/third_party/libtiff/0038-fix-ojpeg-hack.patch b/third_party/libtiff/0038-fix-ojpeg-hack.patch
new file mode 100644
index 0000000..96aad74
--- /dev/null
+++ b/third_party/libtiff/0038-fix-ojpeg-hack.patch
@@ -0,0 +1,201 @@
+diff --git a/third_party/libtiff/tif_dirread.c b/third_party/libtiff/tif_dirread.c
+index 58c918181..e93072456 100644
+--- a/third_party/libtiff/tif_dirread.c
++++ b/third_party/libtiff/tif_dirread.c
+@@ -3796,57 +3796,7 @@ TIFFReadDirectory(TIFF* tif)
+ 		MissingRequired(tif,"ImageLength");
+ 		goto bad;
+ 	}
+-	/*
+-	 * Setup appropriate structures (by strip or by tile)
+-	 */
+-	if (!TIFFFieldSet(tif, FIELD_TILEDIMENSIONS)) {
+-		tif->tif_dir.td_nstrips = TIFFNumberOfStrips(tif);  
+-		tif->tif_dir.td_tilewidth = tif->tif_dir.td_imagewidth;
+-		tif->tif_dir.td_tilelength = tif->tif_dir.td_rowsperstrip;
+-		tif->tif_dir.td_tiledepth = tif->tif_dir.td_imagedepth;
+-		tif->tif_flags &= ~TIFF_ISTILED;
+-	} else {
+-		tif->tif_dir.td_nstrips = TIFFNumberOfTiles(tif);
+-		tif->tif_flags |= TIFF_ISTILED;
+-	}
+-	if (!tif->tif_dir.td_nstrips) {
+-		TIFFErrorExt(tif->tif_clientdata, module,
+-		    "Cannot handle zero number of %s",
+-		    isTiled(tif) ? "tiles" : "strips");
+-		goto bad;
+-	}
+-	if (tif->tif_dir.td_nstrips > INT_MAX) {
+-		TIFFErrorExt(tif->tif_clientdata, module,
+-		    "Cannot handle %u number of %s",
+-		    tif->tif_dir.td_nstrips,
+-		    isTiled(tif) ? "tiles" : "strips");
+-		goto bad;
+-	}
+-	tif->tif_dir.td_stripsperimage = tif->tif_dir.td_nstrips;
+-	if (tif->tif_dir.td_planarconfig == PLANARCONFIG_SEPARATE)
+-		tif->tif_dir.td_stripsperimage /= tif->tif_dir.td_samplesperpixel;
+-	if (!TIFFFieldSet(tif, FIELD_STRIPOFFSETS)) {
+-#ifdef OJPEG_SUPPORT
+-		if ((tif->tif_dir.td_compression==COMPRESSION_OJPEG) &&
+-		    (isTiled(tif)==0) &&
+-		    (tif->tif_dir.td_nstrips==1)) {
+-			/*
+-			 * XXX: OJPEG hack.
+-			 * If a) compression is OJPEG, b) it's not a tiled TIFF,
+-			 * and c) the number of strips is 1,
+-			 * then we tolerate the absence of stripoffsets tag,
+-			 * because, presumably, all required data is in the
+-			 * JpegInterchangeFormat stream.
+-			 */
+-			TIFFSetFieldBit(tif, FIELD_STRIPOFFSETS);
+-		} else
+-#endif
+-        {
+-			MissingRequired(tif,
+-				isTiled(tif) ? "TileOffsets" : "StripOffsets");
+-			goto bad;
+-		}
+-	}
++
+ 	/*
+ 	 * Second pass: extract other information.
+ 	 */
+@@ -4051,41 +4001,6 @@ TIFFReadDirectory(TIFF* tif)
+ 			} /* -- if (!dp->tdir_ignore) */
+ 		} /* -- for-loop -- */
+ 
+-        if( tif->tif_mode == O_RDWR &&
+-            tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 &&
+-            tif->tif_dir.td_stripoffset_entry.tdir_count == 0 &&
+-            tif->tif_dir.td_stripoffset_entry.tdir_type == 0 &&
+-            tif->tif_dir.td_stripoffset_entry.tdir_offset.toff_long8 == 0 &&
+-            tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 &&
+-            tif->tif_dir.td_stripbytecount_entry.tdir_count == 0 &&
+-            tif->tif_dir.td_stripbytecount_entry.tdir_type == 0 &&
+-            tif->tif_dir.td_stripbytecount_entry.tdir_offset.toff_long8 == 0 )
+-        {
+-            /* Directory typically created with TIFFDeferStrileArrayWriting() */
+-            TIFFSetupStrips(tif);
+-        }
+-        else if( !(tif->tif_flags&TIFF_DEFERSTRILELOAD) )
+-        {
+-            if( tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 )
+-            {
+-                if (!TIFFFetchStripThing(tif,&(tif->tif_dir.td_stripoffset_entry),
+-                                         tif->tif_dir.td_nstrips,
+-                                         &tif->tif_dir.td_stripoffset_p))
+-                {
+-                    goto bad;
+-                }
+-            }
+-            if( tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 )
+-            {
+-                if (!TIFFFetchStripThing(tif,&(tif->tif_dir.td_stripbytecount_entry),
+-                                         tif->tif_dir.td_nstrips,
+-                                         &tif->tif_dir.td_stripbytecount_p))
+-                {
+-                    goto bad;
+-                }
+-            }
+-        }
+-
+ 	/*
+ 	 * OJPEG hack:
+ 	 * - If a) compression is OJPEG, and b) photometric tag is missing,
+@@ -4156,6 +4071,95 @@ TIFFReadDirectory(TIFF* tif)
+ 		}
+ 	}
+ 
++	/*
++	 * Setup appropriate structures (by strip or by tile)
++	 * We do that only after the above OJPEG hack which alters SamplesPerPixel
++	 * and thus influences the number of strips in the separate planarconfig.
++	 */
++	if (!TIFFFieldSet(tif, FIELD_TILEDIMENSIONS)) {
++		tif->tif_dir.td_nstrips = TIFFNumberOfStrips(tif);  
++		tif->tif_dir.td_tilewidth = tif->tif_dir.td_imagewidth;
++		tif->tif_dir.td_tilelength = tif->tif_dir.td_rowsperstrip;
++		tif->tif_dir.td_tiledepth = tif->tif_dir.td_imagedepth;
++		tif->tif_flags &= ~TIFF_ISTILED;
++	} else {
++		tif->tif_dir.td_nstrips = TIFFNumberOfTiles(tif);
++		tif->tif_flags |= TIFF_ISTILED;
++	}
++	if (!tif->tif_dir.td_nstrips) {
++		TIFFErrorExt(tif->tif_clientdata, module,
++		    "Cannot handle zero number of %s",
++		    isTiled(tif) ? "tiles" : "strips");
++		goto bad;
++	}
++	if (tif->tif_dir.td_nstrips > INT_MAX) {
++		TIFFErrorExt(tif->tif_clientdata, module,
++		    "Cannot handle %u number of %s",
++		    tif->tif_dir.td_nstrips,
++		    isTiled(tif) ? "tiles" : "strips");
++		goto bad;
++	}
++	tif->tif_dir.td_stripsperimage = tif->tif_dir.td_nstrips;
++	if (tif->tif_dir.td_planarconfig == PLANARCONFIG_SEPARATE)
++		tif->tif_dir.td_stripsperimage /= tif->tif_dir.td_samplesperpixel;
++	if (!TIFFFieldSet(tif, FIELD_STRIPOFFSETS)) {
++#ifdef OJPEG_SUPPORT
++		if ((tif->tif_dir.td_compression==COMPRESSION_OJPEG) &&
++		    (isTiled(tif)==0) &&
++		    (tif->tif_dir.td_nstrips==1)) {
++			/*
++			 * XXX: OJPEG hack.
++			 * If a) compression is OJPEG, b) it's not a tiled TIFF,
++			 * and c) the number of strips is 1,
++			 * then we tolerate the absence of stripoffsets tag,
++			 * because, presumably, all required data is in the
++			 * JpegInterchangeFormat stream.
++			 */
++			TIFFSetFieldBit(tif, FIELD_STRIPOFFSETS);
++		} else
++#endif
++        {
++			MissingRequired(tif,
++				isTiled(tif) ? "TileOffsets" : "StripOffsets");
++			goto bad;
++		}
++	}
++
++        if( tif->tif_mode == O_RDWR &&
++            tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 &&
++            tif->tif_dir.td_stripoffset_entry.tdir_count == 0 &&
++            tif->tif_dir.td_stripoffset_entry.tdir_type == 0 &&
++            tif->tif_dir.td_stripoffset_entry.tdir_offset.toff_long8 == 0 &&
++            tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 &&
++            tif->tif_dir.td_stripbytecount_entry.tdir_count == 0 &&
++            tif->tif_dir.td_stripbytecount_entry.tdir_type == 0 &&
++            tif->tif_dir.td_stripbytecount_entry.tdir_offset.toff_long8 == 0 )
++        {
++            /* Directory typically created with TIFFDeferStrileArrayWriting() */
++            TIFFSetupStrips(tif);
++        }
++        else if( !(tif->tif_flags&TIFF_DEFERSTRILELOAD) )
++        {
++            if( tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 )
++            {
++                if (!TIFFFetchStripThing(tif,&(tif->tif_dir.td_stripoffset_entry),
++                                         tif->tif_dir.td_nstrips,
++                                         &tif->tif_dir.td_stripoffset_p))
++                {
++                    goto bad;
++                }
++            }
++            if( tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 )
++            {
++                if (!TIFFFetchStripThing(tif,&(tif->tif_dir.td_stripbytecount_entry),
++                                         tif->tif_dir.td_nstrips,
++                                         &tif->tif_dir.td_stripbytecount_p))
++                {
++                    goto bad;
++                }
++            }
++        }
++
+ 	/*
+ 	 * Make sure all non-color channels are extrasamples.
+ 	 * If it's not the case, define them as such.
diff --git a/third_party/libtiff/README.pdfium b/third_party/libtiff/README.pdfium
index 7b01880..08bbe37 100644
--- a/third_party/libtiff/README.pdfium
+++ b/third_party/libtiff/README.pdfium
@@ -21,3 +21,4 @@
 0035-memcpy-nullptr-zero-size.patch: Check for nullptr and zero size before calling memcpy().
 0036-Replace-sprintf-calls-with-snprintf.patch: Replace sprintf with snprintf for macOS 13 SDK compatibility, from https://gitlab.com/libtiff/libtiff/-/merge_requests/408, edited to apply to PDFium, which does not have libtiff 352cb5a4fb11.
 0037-tiff-read-rgba-tile-ext.patch: Fix (unsigned) integer overflow on strips/tiles > 2 GB.
+0038-fix-ojpeg-hack.patch: Fix OJPEG hack.
diff --git a/third_party/libtiff/tif_dirread.c b/third_party/libtiff/tif_dirread.c
index 58c9181..e930724 100644
--- a/third_party/libtiff/tif_dirread.c
+++ b/third_party/libtiff/tif_dirread.c
@@ -3796,57 +3796,7 @@
 		MissingRequired(tif,"ImageLength");
 		goto bad;
 	}
-	/*
-	 * Setup appropriate structures (by strip or by tile)
-	 */
-	if (!TIFFFieldSet(tif, FIELD_TILEDIMENSIONS)) {
-		tif->tif_dir.td_nstrips = TIFFNumberOfStrips(tif);  
-		tif->tif_dir.td_tilewidth = tif->tif_dir.td_imagewidth;
-		tif->tif_dir.td_tilelength = tif->tif_dir.td_rowsperstrip;
-		tif->tif_dir.td_tiledepth = tif->tif_dir.td_imagedepth;
-		tif->tif_flags &= ~TIFF_ISTILED;
-	} else {
-		tif->tif_dir.td_nstrips = TIFFNumberOfTiles(tif);
-		tif->tif_flags |= TIFF_ISTILED;
-	}
-	if (!tif->tif_dir.td_nstrips) {
-		TIFFErrorExt(tif->tif_clientdata, module,
-		    "Cannot handle zero number of %s",
-		    isTiled(tif) ? "tiles" : "strips");
-		goto bad;
-	}
-	if (tif->tif_dir.td_nstrips > INT_MAX) {
-		TIFFErrorExt(tif->tif_clientdata, module,
-		    "Cannot handle %u number of %s",
-		    tif->tif_dir.td_nstrips,
-		    isTiled(tif) ? "tiles" : "strips");
-		goto bad;
-	}
-	tif->tif_dir.td_stripsperimage = tif->tif_dir.td_nstrips;
-	if (tif->tif_dir.td_planarconfig == PLANARCONFIG_SEPARATE)
-		tif->tif_dir.td_stripsperimage /= tif->tif_dir.td_samplesperpixel;
-	if (!TIFFFieldSet(tif, FIELD_STRIPOFFSETS)) {
-#ifdef OJPEG_SUPPORT
-		if ((tif->tif_dir.td_compression==COMPRESSION_OJPEG) &&
-		    (isTiled(tif)==0) &&
-		    (tif->tif_dir.td_nstrips==1)) {
-			/*
-			 * XXX: OJPEG hack.
-			 * If a) compression is OJPEG, b) it's not a tiled TIFF,
-			 * and c) the number of strips is 1,
-			 * then we tolerate the absence of stripoffsets tag,
-			 * because, presumably, all required data is in the
-			 * JpegInterchangeFormat stream.
-			 */
-			TIFFSetFieldBit(tif, FIELD_STRIPOFFSETS);
-		} else
-#endif
-        {
-			MissingRequired(tif,
-				isTiled(tif) ? "TileOffsets" : "StripOffsets");
-			goto bad;
-		}
-	}
+
 	/*
 	 * Second pass: extract other information.
 	 */
@@ -4051,41 +4001,6 @@
 			} /* -- if (!dp->tdir_ignore) */
 		} /* -- for-loop -- */
 
-        if( tif->tif_mode == O_RDWR &&
-            tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 &&
-            tif->tif_dir.td_stripoffset_entry.tdir_count == 0 &&
-            tif->tif_dir.td_stripoffset_entry.tdir_type == 0 &&
-            tif->tif_dir.td_stripoffset_entry.tdir_offset.toff_long8 == 0 &&
-            tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 &&
-            tif->tif_dir.td_stripbytecount_entry.tdir_count == 0 &&
-            tif->tif_dir.td_stripbytecount_entry.tdir_type == 0 &&
-            tif->tif_dir.td_stripbytecount_entry.tdir_offset.toff_long8 == 0 )
-        {
-            /* Directory typically created with TIFFDeferStrileArrayWriting() */
-            TIFFSetupStrips(tif);
-        }
-        else if( !(tif->tif_flags&TIFF_DEFERSTRILELOAD) )
-        {
-            if( tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 )
-            {
-                if (!TIFFFetchStripThing(tif,&(tif->tif_dir.td_stripoffset_entry),
-                                         tif->tif_dir.td_nstrips,
-                                         &tif->tif_dir.td_stripoffset_p))
-                {
-                    goto bad;
-                }
-            }
-            if( tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 )
-            {
-                if (!TIFFFetchStripThing(tif,&(tif->tif_dir.td_stripbytecount_entry),
-                                         tif->tif_dir.td_nstrips,
-                                         &tif->tif_dir.td_stripbytecount_p))
-                {
-                    goto bad;
-                }
-            }
-        }
-
 	/*
 	 * OJPEG hack:
 	 * - If a) compression is OJPEG, and b) photometric tag is missing,
@@ -4157,6 +4072,95 @@
 	}
 
 	/*
+	 * Setup appropriate structures (by strip or by tile)
+	 * We do that only after the above OJPEG hack which alters SamplesPerPixel
+	 * and thus influences the number of strips in the separate planarconfig.
+	 */
+	if (!TIFFFieldSet(tif, FIELD_TILEDIMENSIONS)) {
+		tif->tif_dir.td_nstrips = TIFFNumberOfStrips(tif);  
+		tif->tif_dir.td_tilewidth = tif->tif_dir.td_imagewidth;
+		tif->tif_dir.td_tilelength = tif->tif_dir.td_rowsperstrip;
+		tif->tif_dir.td_tiledepth = tif->tif_dir.td_imagedepth;
+		tif->tif_flags &= ~TIFF_ISTILED;
+	} else {
+		tif->tif_dir.td_nstrips = TIFFNumberOfTiles(tif);
+		tif->tif_flags |= TIFF_ISTILED;
+	}
+	if (!tif->tif_dir.td_nstrips) {
+		TIFFErrorExt(tif->tif_clientdata, module,
+		    "Cannot handle zero number of %s",
+		    isTiled(tif) ? "tiles" : "strips");
+		goto bad;
+	}
+	if (tif->tif_dir.td_nstrips > INT_MAX) {
+		TIFFErrorExt(tif->tif_clientdata, module,
+		    "Cannot handle %u number of %s",
+		    tif->tif_dir.td_nstrips,
+		    isTiled(tif) ? "tiles" : "strips");
+		goto bad;
+	}
+	tif->tif_dir.td_stripsperimage = tif->tif_dir.td_nstrips;
+	if (tif->tif_dir.td_planarconfig == PLANARCONFIG_SEPARATE)
+		tif->tif_dir.td_stripsperimage /= tif->tif_dir.td_samplesperpixel;
+	if (!TIFFFieldSet(tif, FIELD_STRIPOFFSETS)) {
+#ifdef OJPEG_SUPPORT
+		if ((tif->tif_dir.td_compression==COMPRESSION_OJPEG) &&
+		    (isTiled(tif)==0) &&
+		    (tif->tif_dir.td_nstrips==1)) {
+			/*
+			 * XXX: OJPEG hack.
+			 * If a) compression is OJPEG, b) it's not a tiled TIFF,
+			 * and c) the number of strips is 1,
+			 * then we tolerate the absence of stripoffsets tag,
+			 * because, presumably, all required data is in the
+			 * JpegInterchangeFormat stream.
+			 */
+			TIFFSetFieldBit(tif, FIELD_STRIPOFFSETS);
+		} else
+#endif
+        {
+			MissingRequired(tif,
+				isTiled(tif) ? "TileOffsets" : "StripOffsets");
+			goto bad;
+		}
+	}
+
+        if( tif->tif_mode == O_RDWR &&
+            tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 &&
+            tif->tif_dir.td_stripoffset_entry.tdir_count == 0 &&
+            tif->tif_dir.td_stripoffset_entry.tdir_type == 0 &&
+            tif->tif_dir.td_stripoffset_entry.tdir_offset.toff_long8 == 0 &&
+            tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 &&
+            tif->tif_dir.td_stripbytecount_entry.tdir_count == 0 &&
+            tif->tif_dir.td_stripbytecount_entry.tdir_type == 0 &&
+            tif->tif_dir.td_stripbytecount_entry.tdir_offset.toff_long8 == 0 )
+        {
+            /* Directory typically created with TIFFDeferStrileArrayWriting() */
+            TIFFSetupStrips(tif);
+        }
+        else if( !(tif->tif_flags&TIFF_DEFERSTRILELOAD) )
+        {
+            if( tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 )
+            {
+                if (!TIFFFetchStripThing(tif,&(tif->tif_dir.td_stripoffset_entry),
+                                         tif->tif_dir.td_nstrips,
+                                         &tif->tif_dir.td_stripoffset_p))
+                {
+                    goto bad;
+                }
+            }
+            if( tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 )
+            {
+                if (!TIFFFetchStripThing(tif,&(tif->tif_dir.td_stripbytecount_entry),
+                                         tif->tif_dir.td_nstrips,
+                                         &tif->tif_dir.td_stripbytecount_p))
+                {
+                    goto bad;
+                }
+            }
+        }
+
+	/*
 	 * Make sure all non-color channels are extrasamples.
 	 * If it's not the case, define them as such.
 	 */