diff --git a/widget/gtk2/gtk2compat.h b/widget/gtk2/gtk2compat.h
index 47e5d7c4f11..dbbd1da0cbe 100644
--- a/widget/gtk2/gtk2compat.h
+++ b/widget/gtk2/gtk2compat.h
@@ -216,4 +216,4 @@ gdk_x11_window_get_xid(GdkWindow *window)
 }
 #endif /* __cplusplus */
 
-#endif // _GTK2_COMPAT_H_
+#endif /* _GTK2_COMPAT_H_ */