diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c
index f29c6dade7f6250348b886b44b8be150199f78f7..069273a2483f9069c77fc435ce4a7671be98589b 100644
--- a/fs/afs/dynroot.c
+++ b/fs/afs/dynroot.c
@@ -145,6 +145,9 @@ static struct dentry *afs_dynroot_lookup(struct inode *dir, struct dentry *dentr
 
 	ASSERTCMP(d_inode(dentry), ==, NULL);
 
+	if (flags & LOOKUP_CREATE)
+		return ERR_PTR(-EOPNOTSUPP);
+
 	if (dentry->d_name.len >= AFSNAMEMAX) {
 		_leave(" = -ENAMETOOLONG");
 		return ERR_PTR(-ENAMETOOLONG);