diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 95fcb05..dddf3f0 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -109,7 +109,7 @@
 					     data.time, thread->comm);
 	}
 
-	session->hists.stats.total += data.period;
+	session->hists.stats.total_period += data.period;
 	return 0;
 }