--- a/gfx/layers/opengl/CanvasLayerOGL.cpp
+++ b/gfx/layers/opengl/CanvasLayerOGL.cpp
@@ -220,16 +220,17 @@ CanvasLayerOGL::UpdateSurface()
   if (mDrawTarget && mDrawTarget->GetNativeSurface(gfx::NATIVE_SURFACE_CGCONTEXT_ACCELERATED)) {
     if (!mTexture) {
       mTexture = MakeIOSurfaceTexture((CGContextRef)mDrawTarget->GetNativeSurface(
                                       gfx::NATIVE_SURFACE_CGCONTEXT_ACCELERATED),
                                       gl());
       mTextureTarget = LOCAL_GL_TEXTURE_RECTANGLE_ARB;
       mLayerProgram = gl::RGBARectLayerProgramType;
     }
+    mDrawTarget->Flush();
     return;
   }
 #endif
 
   nsRefPtr<gfxASurface> updatedAreaSurface;
   if (mCanvasGLContext) {
     gfxIntSize size(mBounds.width, mBounds.height);
     nsRefPtr<gfxImageSurface> updatedAreaImageSurface =