diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index d597263fab4f..f14f2a12d061 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -802,6 +802,7 @@ static int pmu_aliases_parse_eager(struct perf_pmu *pmu, int sysfs_fd)
 static int pmu_alias_terms(struct perf_pmu_alias *alias, struct list_head *terms)
 {
 	struct parse_events_terms alias_terms;
+	struct parse_events_term *term;
 	int ret;
 
 	parse_events_terms__init(&alias_terms);
@@ -812,6 +813,13 @@ static int pmu_alias_terms(struct perf_pmu_alias *alias, struct list_head *terms
 		parse_events_terms__exit(&alias_terms);
 		return ret;
 	}
+	list_for_each_entry(term, &alias_terms.terms, list) {
+		/*
+		 * Weak terms don't override command line options,
+		 * which we don't want for implicit terms in aliases.
+		 */
+		term->weak = true;
+	}
 	list_splice_init(&alias_terms.terms, terms);
 	parse_events_terms__exit(&alias_terms);
 	return 0;