diff --git a/fs/btrfs/space-info.h b/fs/btrfs/space-info.h
index 2033b71b18ce..0bb9d14e60a8 100644
--- a/fs/btrfs/space-info.h
+++ b/fs/btrfs/space-info.h
@@ -27,6 +27,7 @@ enum btrfs_reserve_flush_enum {
 	 * - Running delayed refs
 	 * - Running delalloc and waiting for ordered extents
 	 * - Allocating a new chunk
+	 * - Committing transaction
 	 */
 	BTRFS_RESERVE_FLUSH_EVICT,