diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 4068c2b102..6f8bad9d76 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -810,9 +810,10 @@ bool SkGpuDevice::shouldTileImageID(uint32_t imageID, const SkIRect& imageRect,
                                clippedSubset);
     *tileSize = kBmpSmallTileSize; // already know whole bitmap fits in one max sized tile.
     size_t usedTileBytes = get_tile_count(*clippedSubset, kBmpSmallTileSize) *
-                           kBmpSmallTileSize * kBmpSmallTileSize;
+                           kBmpSmallTileSize * kBmpSmallTileSize *
+                           sizeof(SkPMColor);  // assume 32bit pixels;
 
-    return usedTileBytes < 2 * bmpSize;
+    return usedTileBytes * 2 < bmpSize;
 }
 
 bool SkGpuDevice::shouldTileImage(const SkImage* image, const SkRect* srcRectPtr,