diff --git a/gdk/gdkdraw.c b/gdk/gdkdraw.c
index 78c8dfeeec..8dc121413a 100644
--- a/gdk/gdkdraw.c
+++ b/gdk/gdkdraw.c
@@ -115,8 +115,7 @@ gdk_drawable_get_size (GdkDrawable *drawable,
 {
   g_return_if_fail (GDK_IS_DRAWABLE (drawable));
 
-  if (GDK_DRAWABLE_GET_CLASS (drawable)->get_size != NULL)
-    GDK_DRAWABLE_GET_CLASS (drawable)->get_size (drawable, width, height);  
+  GDK_DRAWABLE_GET_CLASS (drawable)->get_size (drawable, width, height);  
 }
 
 /**