diff --git a/gm/arithmode.cpp b/gm/arithmode.cpp
index 6f10dd6..f5e1091 100644
--- a/gm/arithmode.cpp
+++ b/gm/arithmode.cpp
@@ -19,7 +19,7 @@
     SkBitmap bm;
     bm.setConfig(SkBitmap::kARGB_8888_Config, WW, HH);
     bm.allocPixels();
-    bm.eraseColor(0);
+    bm.eraseColor(SK_ColorTRANSPARENT);
     return bm;
 }