diff --git a/include/wx/mac/pngread.h b/include/wx/mac/pngread.h
index 2a5b4b40cd..2a9307ba9b 100644
--- a/include/wx/mac/pngread.h
+++ b/include/wx/mac/pngread.h
@@ -50,7 +50,7 @@ protected:
 
   long EfeWidth;	 	// Efective Width
 
-  GWorldPtr lpbi;
+  void *lpbi;
   int bgindex;
   wxPalette* m_palette;
   bool imageOK;