diff --git a/mozilla/content/canvas/src/nsCanvasRenderingContext2D.cpp b/mozilla/content/canvas/src/nsCanvasRenderingContext2D.cpp
index 6a58f9c81af..ed7d20f0cb7 100644
--- a/mozilla/content/canvas/src/nsCanvasRenderingContext2D.cpp
+++ b/mozilla/content/canvas/src/nsCanvasRenderingContext2D.cpp
@@ -1022,7 +1022,8 @@ nsCanvasRenderingContext2D::Render(nsIRenderingContext *rc)
                                                  NULL);
     CGColorSpaceRef rgb = CGColorSpaceCreateDeviceRGB();
     img = CGImageCreate (mWidth, mHeight, 8, 32, mWidth * 4, rgb,
-                         kCGImageAlphaPremultipliedFirst | CG_BITMAP_BYTE_ORDER_FLAG,
+                         (CGImageAlphaInfo)(kCGImageAlphaPremultipliedFirst |
+                                            CG_BITMAP_BYTE_ORDER_FLAG),
                          dataProvider, NULL, false, kCGRenderingIntentDefault);
     CGColorSpaceRelease (rgb);
     CGDataProviderRelease (dataProvider);