diff --git a/ext/phar/phar_object.c b/ext/phar/phar_object.c
index 9f83fa991d4df..ab76377930af2 100644
--- a/ext/phar/phar_object.c
+++ b/ext/phar/phar_object.c
@@ -2768,6 +2768,7 @@ PHP_METHOD(Phar, setAlias)
 	phar_flush(phar_obj->archive, NULL, 0, 0, &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;