diff --git a/gfx/thebes/gfxPlatform.cpp b/gfx/thebes/gfxPlatform.cpp
index 1957a7fed38..a9c3569736e 100644
--- a/gfx/thebes/gfxPlatform.cpp
+++ b/gfx/thebes/gfxPlatform.cpp
@@ -938,7 +938,7 @@ gfxPlatform::GetThebesSurfaceForDrawTarget(DrawTarget *aTarget)
   }
 
   IntSize size = data->GetSize();
-  gfxImageFormat format = OptimalFormatForContent(ContentForFormat(data->GetFormat()));
+  gfxImageFormat format = SurfaceFormatToImageFormat(data->GetFormat());
 
 
   nsRefPtr<gfxASurface> surf =