diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 66d095d7955..b6fa792d6b8 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -655,7 +655,7 @@ static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *x)
 	default:
 		return nfserr_bad_xdr;
 	}
-	w &= !NFS4_SHARE_ACCESS_MASK;
+	w &= ~NFS4_SHARE_ACCESS_MASK;
 	if (!w)
 		return nfs_ok;
 	if (!argp->minorversion)