diff --git a/cborg/src/Codec/CBOR/Magic.hs b/cborg/src/Codec/CBOR/Magic.hs
index 0160881..b1ff177 100644
--- a/cborg/src/Codec/CBOR/Magic.hs
+++ b/cborg/src/Codec/CBOR/Magic.hs
@@ -109,7 +109,7 @@ import           Data.ByteString (ByteString)
 import qualified Data.ByteString          as BS
 import qualified Data.ByteString.Internal as BS
 import qualified Data.ByteString.Unsafe   as BS
-import           Data.Primitive.ByteArray as Prim hiding (copyByteArrayToPtr)
+import           Data.Primitive.ByteArray as Prim hiding (copyByteArrayToPtr, copyPtrToMutableByteArray)
 
 import           Foreign.ForeignPtr (withForeignPtr)
 import           Foreign.C (CUShort)