diff --git a/tools/perf/tests/evsel-tp-sched.c b/tools/perf/tests/evsel-tp-sched.c
index f79e7d059820d85f7f5ad38dc8c1a83d067e1dc7..9b98c1554833ede7de9bdc8d7d312352ea863486 100644
--- a/tools/perf/tests/evsel-tp-sched.c
+++ b/tools/perf/tests/evsel-tp-sched.c
@@ -49,7 +49,7 @@ int test__perf_evsel__tp_sched_test(void)
 	if (perf_evsel__test_field(evsel, "prev_prio", 4, true))
 		ret = -1;
 
-	if (perf_evsel__test_field(evsel, "prev_state", 8, true))
+	if (perf_evsel__test_field(evsel, "prev_state", sizeof(long), true))
 		ret = -1;
 
 	if (perf_evsel__test_field(evsel, "next_comm", 16, true))