diff --git a/tools/perf/util/pmus.c b/tools/perf/util/pmus.c
index ce4931461741..6c1440cd4f1a 100644
--- a/tools/perf/util/pmus.c
+++ b/tools/perf/util/pmus.c
@@ -480,8 +480,8 @@ void perf_pmus__print_pmu_events(const struct print_callbacks *print_cb, void *p
 	qsort(aliases, len, sizeof(struct sevent), cmp_sevent);
 	for (int j = 0; j < len; j++) {
 		/* Skip duplicates */
-		if (j > 0 && pmu_alias_is_duplicate(&aliases[j], &aliases[j - 1]))
-			continue;
+		if (j < len - 1 && pmu_alias_is_duplicate(&aliases[j], &aliases[j + 1]))
+			goto free;
 
 		print_cb->print_event(print_state,
 				aliases[j].pmu_name,
@@ -494,6 +494,7 @@ void perf_pmus__print_pmu_events(const struct print_callbacks *print_cb, void *p
 				aliases[j].desc,
 				aliases[j].long_desc,
 				aliases[j].encoding_desc);
+free:
 		zfree(&aliases[j].name);
 		zfree(&aliases[j].alias);
 		zfree(&aliases[j].scale_unit);