diff --git a/src/Graphics/UI/WX/Window.hs b/src/Graphics/UI/WX/Window.hs
index 0b04fa9..39c0505 100644
--- a/src/Graphics/UI/WX/Window.hs
+++ b/src/Graphics/UI/WX/Window.hs
@@ -1,2 +1,2 @@
-{-# LANGUAGE TypeSynonymInstances, FlexibleInstances #-}
+{-# LANGUAGE TypeSynonymInstances, FlexibleInstances, FlexibleContexts #-}
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