diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 9ff6cf3e9a99..97dc2808885d 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -346,7 +346,7 @@ static struct hist_entry *add_hist_entry(struct hists *hists,
 	struct rb_node **p;
 	struct rb_node *parent = NULL;
 	struct hist_entry *he;
-	int cmp;
+	int64_t cmp;
 
 	p = &hists->entries_in->rb_node;
 
@@ -884,7 +884,7 @@ static struct hist_entry *hists__add_dummy_entry(struct hists *hists,
 	struct rb_node **p;
 	struct rb_node *parent = NULL;
 	struct hist_entry *he;
-	int cmp;
+	int64_t cmp;
 
 	if (sort__need_collapse)
 		root = &hists->entries_collapsed;