diff --git a/Data/ByteString/Short/Internal.hs b/Data/ByteString/Short/Internal.hs
index a546d22be..38d113ad3 100644
--- a/Data/ByteString/Short/Internal.hs
+++ b/Data/ByteString/Short/Internal.hs
@@ -167,6 +167,12 @@ import Data.ByteString.Internal.Type
 
 import Data.Array.Byte
   ( ByteArray(..), MutableByteArray(..) )
+#if MIN_VERSION_base(4,11,0) && !defined(PURE_HASKELL)
+import Foreign.C.Types
+  ( CSize(..)
+  , CInt(..)
+  )
+#endif
 import Data.Bits
   ( FiniteBits (finiteBitSize)
   , shiftL