diff --git a/gtk/gtk.symbols b/gtk/gtk.symbols
index 660ebf01d1..b331d1a3a6 100644
--- a/gtk/gtk.symbols
+++ b/gtk/gtk.symbols
@@ -2723,6 +2723,13 @@ gtk_object_get_type G_GNUC_CONST
 #endif
 #endif
 
+#if IN_HEADER(__GTK_OFFSCREEN_WINDOW_H__)
+#if IN_FILE(__GTK_OFFSCREEN_WINDOW_C__)
+gtk_offscreen_window_get_type G_GNUC_CONST
+gtk_offscreen_window_new
+#endif
+#endif
+
 #if IN_HEADER(__GTK_ORIENTABLE_H__)
 #if IN_FILE(__GTK_ORIENTABLE_C__)
 gtk_orientable_get_orientation
diff --git a/gtk/gtkoffscreenwindow.c b/gtk/gtkoffscreenwindow.c
index bb3efaf86f..b1ca0854bf 100644
--- a/gtk/gtkoffscreenwindow.c
+++ b/gtk/gtkoffscreenwindow.c
@@ -1,4 +1,5 @@
 #include "gtkoffscreenwindow.h"
+#include "gtkalias.h"
 
 G_DEFINE_TYPE (GtkOffscreenWindow, gtk_offscreen_window, GTK_TYPE_WINDOW);