diff --git a/ext/phar/phar_object.c b/ext/phar/phar_object.c
index 415427099a5..f9748fc49f2 100644
--- a/ext/phar/phar_object.c
+++ b/ext/phar/phar_object.c
@@ -2778,6 +2778,7 @@ valid_alias:
 	phar_flush(phar_obj->archive, &error);
 
 	if (error) {
+		pefree(phar_obj->archive->alias, phar_obj->archive->is_persistent);
 		phar_obj->archive->alias = oldalias;
 		phar_obj->archive->alias_len = oldalias_len;
 		phar_obj->archive->is_temporary_alias = old_temp;