diff --git a/Graphics/UI/Gtk/OSX/Window.chs b/Graphics/UI/Gtk/OSX/Window.chs
--- a/Graphics/UI/Gtk/OSX/Window.chs
+++ b/Graphics/UI/Gtk/OSX/Window.chs
@@ -6,6 +6,7 @@
 import System.Glib.FFI
 {#import Graphics.UI.Gtk.OSX.Types#}
 
+allowFullscreen :: DrawWindowClass window => window -> IO ()
 allowFullscreen window =
     {# call unsafe gtk2hs_osx_allow_fullscreen #}
         (toDrawWindow window)
diff --git a/gtk3-mac-integration.cabal b/gtk3-mac-integration.cabal
--- a/gtk3-mac-integration.cabal
+++ b/gtk3-mac-integration.cabal
@@ -1,5 +1,5 @@
 Name:           gtk3-mac-integration
-Version:        0.3.1.0
+Version:        0.3.1.1
 License:        LGPL-2.1
 License-file:   COPYING
 Copyright:      (c) 2001-2010 The Gtk2Hs Team