diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c
index 4fce417432aad6902b97fe74c02efdf5967d860f..ed66f2e384645c16e3ca768a0684bb9cbcf04a23 100644
--- a/tools/lib/perf/evlist.c
+++ b/tools/lib/perf/evlist.c
@@ -479,7 +479,7 @@ mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
 			refcount_set(&map->refcnt, 2);
 
 			if (ops->idx)
-				ops->idx(evlist, mp, idx);
+				ops->idx(evlist, evsel, mp, idx);
 
 			if (ops->mmap(map, mp, *output, evlist_cpu) < 0)
 				return -1;
diff --git a/tools/lib/perf/include/internal/evlist.h b/tools/lib/perf/include/internal/evlist.h
index 0d5c830431a75a1f24f439b3b598a6d0bf4c87fc..6f89aec3e6084d4b1035cd74cbc06bd7a45e320f 100644
--- a/tools/lib/perf/include/internal/evlist.h
+++ b/tools/lib/perf/include/internal/evlist.h
@@ -38,7 +38,8 @@ struct perf_evlist {
 };
 
 typedef void
-(*perf_evlist_mmap__cb_idx_t)(struct perf_evlist*, struct perf_mmap_param*, int);
+(*perf_evlist_mmap__cb_idx_t)(struct perf_evlist*, struct perf_evsel*,
+			      struct perf_mmap_param*, int);
 typedef struct perf_mmap*
 (*perf_evlist_mmap__cb_get_t)(struct perf_evlist*, bool, int);
 typedef int
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 09a1d3400fd98f70d82d95fffdd7113111127b70..7ae56b062f440a93eff0855b3c210ead8f4b8f5d 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -747,6 +747,7 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
 
 static void
 perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist,
+			 struct perf_evsel *_evsel __maybe_unused,
 			 struct perf_mmap_param *_mp,
 			 int idx)
 {