diff --git a/fpdfsdk/fpdfview.cpp b/fpdfsdk/fpdfview.cpp
index 98a5b32..96777cc 100644
--- a/fpdfsdk/fpdfview.cpp
+++ b/fpdfsdk/fpdfview.cpp
@@ -866,10 +866,12 @@
   // of masks. Full page bitmaps result in large spool sizes, so they should
   // only be used when necessary. For large numbers of masks, rendering each
   // individually is inefficient and unlikely to significantly improve spool
-  // size.
-  const bool bNewBitmap =
-      pPage->BackgroundAlphaNeeded() ||
-      (pPage->HasImageMask() && pPage->GetMaskBoundingBoxes().size() > 100);
+  // size. TODO (rbpotter): Find out why this still breaks printing for some
+  // PDFs (see crbug.com/777837).
+  const bool bEnableImageMasks = false;
+  const bool bNewBitmap = pPage->BackgroundAlphaNeeded() ||
+                          (pPage->HasImageMask() && !bEnableImageMasks) ||
+                          pPage->GetMaskBoundingBoxes().size() > 100;
   const bool bHasMask = pPage->HasImageMask() && !bNewBitmap;
   if (bNewBitmap || bHasMask) {
     pBitmap = pdfium::MakeRetain<CFX_DIBitmap>();