diff --git a/XMonad/Config/Bluetile.hs b/XMonad/Config/Bluetile.hs
index 7796de5b..e0aaea68 100644
--- a/XMonad/Config/Bluetile.hs
+++ b/XMonad/Config/Bluetile.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE FlexibleContexts #-}
 {-# OPTIONS -fno-warn-missing-signatures #-}
 ----------------------------------------------------------------------------
 -- |
diff --git a/XMonad/Prompt.hs b/XMonad/Prompt.hs
index 0a032c4b..d18a85fb 100644
--- a/XMonad/Prompt.hs
+++ b/XMonad/Prompt.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE ExistentialQuantification #-}
 -----------------------------------------------------------------------------
 -- |