diff --git a/third_party/libtiff/0007-uninitialized-value.patch b/third_party/libtiff/0007-uninitialized-value.patch
new file mode 100644
index 0000000..f6e9806
--- /dev/null
+++ b/third_party/libtiff/0007-uninitialized-value.patch
@@ -0,0 +1,13 @@
+diff --git a/third_party/libtiff/tif_dirread.c b/third_party/libtiff/tif_dirread.c
+index 5ef3264..bc41021 100644
+--- a/third_party/libtiff/tif_dirread.c
++++ b/third_party/libtiff/tif_dirread.c
+@@ -4443,7 +4443,7 @@ TIFFFetchDirectory(TIFF* tif, uint64 diroff, TIFFDirEntry** pdir,
+ 	static const char module[] = "TIFFFetchDirectory";
+ 
+ 	void* origdir;
+-	uint16 dircount16;
++	uint16 dircount16 = 0;
+ 	uint32 dirsize;
+ 	TIFFDirEntry* dir;
+ 	uint8* ma;
diff --git a/third_party/libtiff/README.pdfium b/third_party/libtiff/README.pdfium
index 936cd94..2f9c4f9 100644
--- a/third_party/libtiff/README.pdfium
+++ b/third_party/libtiff/README.pdfium
@@ -16,3 +16,4 @@
 0004-CVE-2015-8784.patch: Security fixes
 0005-Leak-TIFFFetchStripThing.patch: Fix a memory leak
 0006-HeapBufferOverflow-ChopUpSingleUncompressedStrip.patch: Fix a heap buffer overflow
+0007-uninitialized-value.patch: Fix potentially uninitialized dircount value
diff --git a/third_party/libtiff/tif_dirread.c b/third_party/libtiff/tif_dirread.c
index 5ef3264..bc41021 100644
--- a/third_party/libtiff/tif_dirread.c
+++ b/third_party/libtiff/tif_dirread.c
@@ -4443,7 +4443,7 @@
 	static const char module[] = "TIFFFetchDirectory";
 
 	void* origdir;
-	uint16 dircount16;
+	uint16 dircount16 = 0;
 	uint32 dirsize;
 	TIFFDirEntry* dir;
 	uint8* ma;