diff --git a/cfg/gtk.cfg b/cfg/gtk.cfg
index 2b22eadd2..b3a3c40b6 100644
--- a/cfg/gtk.cfg
+++ b/cfg/gtk.cfg
@@ -10,9 +10,17 @@
   <define name="G_LIKELY(expr)" value="(expr)"/>
   <define name="G_UNLIKELY(expr)" value="(expr)"/>
   <define name="G_OBJECT(obj)" value="(GObject*)(obj)"/>
+  <define name="GTK_BOX(obj)" value="((GtkBox*)(obj))"/>
+  <define name="GTK_CONTAINER(obj)" value="((GtkContainer*)(obj))"/>
+  <define name="GTK_ENTRY(obj)" value="((GtkEntry*)(obj))"/>
+  <define name="GTK_OBJECT(obj)" value="((GtkObject*)(obj))"/>
+  <define name="GTK_TABLE(obj)" value="((GtkTable*)(obj))"/>
+  <define name="GTK_TOGGLE_BUTTON(obj)" value="((GtkToggleButton*)(obj))"/>
+  <define name="GTK_WIDGET(widget)" value="((GtkWidget*)(widget))"/>
+  <define name="GTK_WINDOW(obj)" value="((GtkWindow*)(obj))"/>
   <!-- https://developer.gnome.org/glib/stable/glib-Type-Conversion-Macros.html -->
   <define name="GINT_TO_POINTER(i)" value="((gpointer) (glong) (i))"/>
-  <define name="GPOINTER_TO_INT(p)" value="((gint)  (glong) (p))"/>
+  <define name="GPOINTER_TO_INT(p)" value="((gint) (glong) (p))"/>
   <define name="GUINT_TO_POINTER(u)" value="((gpointer) (gulong) (u))"/>
   <define name="GPOINTER_TO_UINT(p)" value="((guint) (gulong) (p))"/>
   <define name="GSIZE_TO_POINTER(s)" value="((gpointer) (gsize) (s))"/>