--- a/gfx/thebes/public/gfxPlatform.h
+++ b/gfx/thebes/public/gfxPlatform.h
@@ -42,17 +42,17 @@
 #include "prtypes.h"
 #include "nsVoidArray.h"
 
 #include "gfxTypes.h"
 #include "gfxASurface.h"
 
 class gfxImageSurface;
 class gfxFontGroup;
-class gfxFontStyle;
+struct gfxFontStyle;
 
 class THEBES_API gfxPlatform {
 public:
     /**
      * Return a pointer to the current active platform.
      * This is a singleton; it contains mostly convenience
      * functions to obtain platform-specific objects.
      */