diff --git a/tools/perf/util/thread_map.c b/tools/perf/util/thread_map.c
index 6ec3c5ca438f25c827dcfc1b7bde3491f8a5fe8c..371fb28fe5b1b95481c910cb2bf56068fe0509e2 100644
--- a/tools/perf/util/thread_map.c
+++ b/tools/perf/util/thread_map.c
@@ -304,6 +304,7 @@ static struct thread_map *thread_map__new_by_tid_str(const char *tid_str)
 
 out_free_threads:
 	zfree(&threads);
+	strlist__delete(slist);
 	goto out;
 }