diff --git a/mozilla/gfx/src/mac/nsDrawingSurfaceMac.cpp b/mozilla/gfx/src/mac/nsDrawingSurfaceMac.cpp
index 3229c914e91..ca6403777e4 100644
--- a/mozilla/gfx/src/mac/nsDrawingSurfaceMac.cpp
+++ b/mozilla/gfx/src/mac/nsDrawingSurfaceMac.cpp
@@ -202,7 +202,7 @@ NS_IMETHODIMP nsDrawingSurfaceMac :: Init(GrafPtr aPort)
 NS_IMETHODIMP nsDrawingSurfaceMac :: Init(nsIWidget *aTheWidget)
 {
 	// get our native graphics port from the widget
- 	mPort = static_cast<GrafPtr>(aTheWidget->GetNativeData(NS_NATIVE_DISPLAY));
+ 	mPort = reinterpret_cast<GrafPtr>(aTheWidget->GetNativeData(NS_NATIVE_GRAPHIC));
 	mGS->Init(aTheWidget);
   return NS_OK;
 }