diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 9994709ef12b..e765a7ffb0d6 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -2134,7 +2134,7 @@ static char *format_alias(char *buf, int len, const struct perf_pmu *pmu,
 						   skip_duplicate_pmus);
 
 	/* Paramemterized events have the parameters shown. */
-	if (strstr(alias->terms, "=?")) {
+	if (!strstr(alias->terms, "=?")) {
 		/* No parameters. */
 		snprintf(buf, len, "%.*s/%s/", (int)pmu_name_len, pmu->name, alias->name);
 		return buf;