diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index add1638..2dfff7a 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -31,7 +31,7 @@
  * if the number of exit event reported by the kernel is 1 or not
  * in order to check the kernel returns correct number of event.
  */
-int test__task_exit(void)
+int test__task_exit(int subtest __maybe_unused)
 {
 	int err = -1;
 	union perf_event *event;