diff --git a/pointed.cabal b/pointed.cabal
--- a/pointed.cabal
+++ b/pointed.cabal
@@ -1,6 +1,6 @@
 name:          pointed
 category:      Data
-version:       3.0.2
+version:       3.0.3
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
diff --git a/src/Data/Copointed.hs b/src/Data/Copointed.hs
--- a/src/Data/Copointed.hs
+++ b/src/Data/Copointed.hs
@@ -1,3 +1,7 @@
+{-# LANGUAGE CPP #-}
+#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ >= 702
+{-# LANGUAGE Trustworthy #-}
+#endif
 module Data.Copointed where
 
 import Data.Default
diff --git a/src/Data/Pointed.hs b/src/Data/Pointed.hs
--- a/src/Data/Pointed.hs
+++ b/src/Data/Pointed.hs
@@ -1,3 +1,7 @@
+{-# LANGUAGE CPP #-}
+#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ >= 702
+{-# LANGUAGE Trustworthy #-}
+#endif
 module Data.Pointed where
 
 import Control.Arrow