diff --git a/external/cddl/osnet/dist/uts/common/fs/zfs/zfs_vnops.c b/external/cddl/osnet/dist/uts/common/fs/zfs/zfs_vnops.c
index 88fd73376616..4d58a4a971cb 100644
--- a/external/cddl/osnet/dist/uts/common/fs/zfs/zfs_vnops.c
+++ b/external/cddl/osnet/dist/uts/common/fs/zfs/zfs_vnops.c
@@ -5027,7 +5027,7 @@ zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr,
 #endif
 
 	default:
-		return (EINVAL);
+		return (EOPNOTSUPP);
 	}
 }