diff --git a/Data/Vector/Storable/Internal.hs b/Data/Vector/Storable/Internal.hs
index 69a46d84215b7ed6660429d3c90cfa22673a8202..0ed2188e72742ef36838c558fa9d578bee3aacd3 100644
--- a/Data/Vector/Storable/Internal.hs
+++ b/Data/Vector/Storable/Internal.hs
@@ -14,8 +14,8 @@ module Data.Vector.Storable.Internal (
   getPtr, setPtr, updPtr
 ) where
 
-import Foreign.ForeignPtr
-import Foreign.Ptr
+import Foreign.ForeignPtr ()
+import Foreign.Ptr        ()
 import GHC.ForeignPtr   ( ForeignPtr(..) )
 import GHC.Ptr          ( Ptr(..) )
 
diff --git a/Data/Vector/Storable/Mutable.hs b/Data/Vector/Storable/Mutable.hs
index cfdf6e57590342ee397ed13fb535843eb266c554..5e3cd9aac141bac7242c733c91abef2df8482de0 100644
--- a/Data/Vector/Storable/Mutable.hs
+++ b/Data/Vector/Storable/Mutable.hs
@@ -82,7 +82,7 @@ import GHC.Prim (byteArrayContents#, unsafeCoerce#)
 import GHC.ForeignPtr
 #endif
 
-import Foreign.Ptr
+import Foreign.Ptr ()
 import Foreign.Marshal.Array ( advancePtr, copyArray, moveArray )
 
 import Control.Monad.Primitive