--- a/gfx/2d/SourceSurfaceD2D1.cpp
+++ b/gfx/2d/SourceSurfaceD2D1.cpp
@@ -153,17 +153,17 @@ DataSourceSurfaceD2D1::Map(MapType aMapT
   if (aMapType == MapType::READ) {
     options = D2D1_MAP_OPTIONS_READ;
   } else {
     MOZ_CRASH("No support for Write maps on D2D1 DataSourceSurfaces yet!");
   }
 
   D2D1_MAPPED_RECT map;
   if (FAILED(mBitmap->Map(D2D1_MAP_OPTIONS_READ, &map))) {
-    gfxCriticalError() << "Failed to map bitmap.";
+    gfxWarning() << "Failed to map bitmap.";
     return false;
   }
   aMappedSurface->mData = map.bits;
   aMappedSurface->mStride = map.pitch;
 
   mIsMapped = true;
   return true;
 }
@@ -189,16 +189,16 @@ void
 DataSourceSurfaceD2D1::EnsureMapped()
 {
   // Do not use GetData() after having used Map!
   MOZ_ASSERT(!mIsMapped);
   if (mMapped) {
     return;
   }
   if (FAILED(mBitmap->Map(D2D1_MAP_OPTIONS_READ, &mMap))) {
-    gfxCriticalError() << "Failed to map bitmap.";
+    gfxWarning() << "Failed to map bitmap.";
     return;
   }
   mMapped = true;
 }
 
 }
 }