diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 51a8f2b..c15fb8c 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -57,6 +57,7 @@
 
 	root->node.parent = NULL;
 	root->node.hit = 0;
+	root->node.children_hit = 0;
 	root->max_depth = 0;
 }