diff --git a/src/catalog.c b/src/catalog.c
index 1b3f48a3..48e5a7ef 100644
--- a/src/catalog.c
+++ b/src/catalog.c
@@ -24,6 +24,7 @@ static pgBackup *readBackupControlFile(const char *path);
 static bool exit_hook_registered = false;
 static parray *lock_files = NULL;
 
+/* Iterate over locked backups and delete locks files */
 static void
 unlink_lock_atexit(void)
 {