diff --git a/gtk/gtkprivate.h b/gtk/gtkprivate.h
index 746103dc4a..5b05f5bb47 100644
--- a/gtk/gtkprivate.h
+++ b/gtk/gtkprivate.h
@@ -37,6 +37,16 @@ G_BEGIN_DECLS
 #define GTK_PARAM_WRITABLE G_PARAM_WRITABLE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB
 #define GTK_PARAM_READWRITE G_PARAM_READWRITE|G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB
 
+#ifdef G_DISABLE_CAST_CHECKS
+/* This is true for debug no and minimum */
+#define gtk_internal_return_if_fail(__expr) G_STMT_START{ (void)0; }G_STMT_END
+#define gtk_internal_return_val_if_fail(__expr, __val) G_STMT_START{ (void)0; }G_STMT_END
+#else
+/* This is true for debug yes */
+#define gtk_internal_return_if_fail(__expr) g_return_if_fail(__expr)
+#define gtk_internal_return_val_if_fail(__expr, __val) g_return_val_if_fail(__expr, __val)
+#endif
+
 const gchar * _gtk_get_datadir            (void);
 const gchar * _gtk_get_libdir             (void);
 const gchar * _gtk_get_sysconfdir         (void);