1 files changed, 1 insertions, 1 deletions
diff --git a/qgroup.h b/qgroup.h
index 7b42d833..5b19ae7c 100644
--- a/qgroup.h
+++ b/qgroup.h
@@ -77,7 +77,7 @@ enum btrfs_qgroup_filter_enum {
 	BTRFS_QGROUP_FILTER_MAX,
 };
 
-int btrfs_qgroup_parse_sort_string(char *opt_arg,
+int btrfs_qgroup_parse_sort_string(const char *opt_arg,
 				struct btrfs_qgroup_comparer_set **comps);
 u64 btrfs_get_path_rootid(int fd);
 int btrfs_show_qgroups(int fd, struct btrfs_qgroup_filter_set *,