diff --git a/mace/core/runtime/hexagon/hexagon_control_wrapper.cc b/mace/core/runtime/hexagon/hexagon_control_wrapper.cc
index 15af069ba2a397fe8e2f3525bf848686a48a74e4..e2ba59433857b1b37aac03a9909678d2efff1ea0 100644
--- a/mace/core/runtime/hexagon/hexagon_control_wrapper.cc
+++ b/mace/core/runtime/hexagon/hexagon_control_wrapper.cc
@@ -275,7 +275,7 @@ void HexagonControlWrapper::GetPerfInfo() {
   float total_duration = 0.0;
 
   VLOG(1) << "items: " << n_items;
-  for (int i = 0; i < n_items; ++i) {
+  for (unsigned int i = 0; i < n_items; ++i) {
     unsigned int node_id = perf_info[i].node_id;
     unsigned int node_type_id = perf_info[i].node_type;
     node_id_counters[node_id] =