diff --git a/listlike-instances.cabal b/listlike-instances.cabal
--- a/listlike-instances.cabal
+++ b/listlike-instances.cabal
@@ -1,5 +1,5 @@
 Name:                listlike-instances
-Version:             0.2.3
+Version:             0.2.3.1
 Synopsis:            Extra instances of the ListLike class
 Description:         Provides ListLike instances for Vector and Text types
 Homepage:            http://jwlato.webfactional.com/haskell/listlike-instances
diff --git a/src/Data/ListLike/Text/Text.hs b/src/Data/ListLike/Text/Text.hs
--- a/src/Data/ListLike/Text/Text.hs
+++ b/src/Data/ListLike/Text/Text.hs
@@ -74,7 +74,6 @@
 
     sequence  = liftM fromList . P.sequence  . toList
     mapM func = liftM fromList . P.mapM func . toList
-    mapM_ func = P.mapM_ func . toList
 
 instance ListLikeIO T.Text Char where
     hGetLine = TI.hGetLine
diff --git a/src/Data/ListLike/Text/TextLazy.hs b/src/Data/ListLike/Text/TextLazy.hs
--- a/src/Data/ListLike/Text/TextLazy.hs
+++ b/src/Data/ListLike/Text/TextLazy.hs
@@ -72,7 +72,6 @@
 
     sequence  = liftM fromList . P.sequence  . toList
     mapM func = liftM fromList . P.mapM func . toList
-    mapM_ func = P.mapM_ func . toList
 
 instance ListLikeIO T.Text Char where
     hGetLine = TI.hGetLine
diff --git a/src/Data/ListLike/Vector/Generic.hs b/src/Data/ListLike/Vector/Generic.hs
--- a/src/Data/ListLike/Vector/Generic.hs
+++ b/src/Data/ListLike/Vector/Generic.hs
@@ -79,7 +79,6 @@
 
     sequence  = liftM fromList . P.sequence  . toList
     mapM func = liftM fromList . P.mapM func . toList
-    mapM_ func = P.mapM_ func . toList
 
 instance (Eq (v Char), V.Vector v Char) => StringLike (v Char) where
     toString = V.toList
diff --git a/src/Data/ListLike/Vector/Storable.hs b/src/Data/ListLike/Vector/Storable.hs
--- a/src/Data/ListLike/Vector/Storable.hs
+++ b/src/Data/ListLike/Vector/Storable.hs
@@ -75,7 +75,6 @@
 
     sequence  = liftM fromList . P.sequence  . toList
     mapM func = liftM fromList . P.mapM func . toList
-    mapM_ func = P.mapM_ func . toList
 
 instance StringLike (V.Vector Char) where
     toString = toList
diff --git a/src/Data/ListLike/Vector/Unboxed.hs b/src/Data/ListLike/Vector/Unboxed.hs
--- a/src/Data/ListLike/Vector/Unboxed.hs
+++ b/src/Data/ListLike/Vector/Unboxed.hs
@@ -74,7 +74,6 @@
 
     sequence  = liftM fromList . P.sequence  . toList
     mapM func = liftM fromList . P.mapM func . toList
-    mapM_ func = P.mapM_ func . toList
 
 instance StringLike (V.Vector Char) where
     toString = toList
diff --git a/src/Data/ListLike/Vector/Vector.hs b/src/Data/ListLike/Vector/Vector.hs
--- a/src/Data/ListLike/Vector/Vector.hs
+++ b/src/Data/ListLike/Vector/Vector.hs
@@ -73,7 +73,6 @@
 
     sequence  = liftM fromList . P.sequence  . toList
     mapM func = liftM fromList . P.mapM func . toList
-    mapM_ func = P.mapM_ func . toList
 
 instance StringLike (V.Vector Char) where
     toString = toList