diff --git a/gtk/gtkcomboboxtext.h b/gtk/gtkcomboboxtext.h
index 91d0c3709a..3b4fa39746 100644
--- a/gtk/gtkcomboboxtext.h
+++ b/gtk/gtkcomboboxtext.h
@@ -19,7 +19,7 @@
 #ifndef __GTK_COMBO_BOX_TEXT_H__
 #define __GTK_COMBO_BOX_TEXT_H__
 
-#if defined(GTK_DISABLE_SINGLE_INCLUDES) && !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
+#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
 #error "Only <gtk/gtk.h> can be included directly."
 #endif