diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 6b9146c..02b2d80 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -166,7 +166,7 @@
 				    PERF_FORMAT_TOTAL_TIME_RUNNING;
 
 	if (system_wide)
-		return perf_evsel__open_per_cpu(evsel, cpus->nr, cpus->map);
+		return perf_evsel__open_per_cpu(evsel, cpus);
 
 	attr->inherit = !no_inherit;
 	if (target_pid == -1 && target_tid == -1) {
@@ -174,7 +174,7 @@
 		attr->enable_on_exec = 1;
 	}
 
-	return perf_evsel__open_per_thread(evsel, threads->nr, threads->map);
+	return perf_evsel__open_per_thread(evsel, threads);
 }
 
 /*