diff --git a/tools/trace-malloc/diffbloatdump.pl b/tools/trace-malloc/diffbloatdump.pl
index 29e08c49986..4967b0dea72 100755
--- a/tools/trace-malloc/diffbloatdump.pl
+++ b/tools/trace-malloc/diffbloatdump.pl
@@ -173,7 +173,7 @@ sub print_calltree() {
         }
     }
 
-    print_node_indent(".root", $calltree, 0);
+    print_node_indent("malloc", $calltree, 0);
 }
 
 add_file($ARGV[0], -1);