diff --git a/config.c b/config.c
index b79baf83e3..39a7d7422c 100644
--- a/config.c
+++ b/config.c
@@ -3879,6 +3879,7 @@ out_no_rollback:
 	free(filename_buf);
 	config_store_data_clear(&store);
 	strbuf_release(&buf);
+	strbuf_release(&copystr);
 	return ret;
 }