diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 6b4d0cc..a372985 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -163,6 +163,9 @@
 	if (!is_owner_or_cap(dentry->d_inode))
 		return -EPERM;
 
+	if (!IS_POSIXACL(dentry->d_inode))
+		return -EOPNOTSUPP;
+
 	if (value) {
 		acl = posix_acl_from_xattr(value, size);
 		if (acl == NULL) {