diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 95e07ea..9cb9296 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1156,14 +1156,10 @@
 			  struct cpu_map *cpus,
 			  struct thread_map *threads)
 {
-	if (evlist->cpus)
-		cpu_map__put(evlist->cpus);
-
+	cpu_map__put(evlist->cpus);
 	evlist->cpus = cpus;
 
-	if (evlist->threads)
-		thread_map__put(evlist->threads);
-
+	thread_map__put(evlist->threads);
 	evlist->threads = threads;
 
 	return perf_evlist__propagate_maps(evlist, false);