diff --git a/lib/include/srslte/common/metrics_hub.h b/lib/include/srslte/common/metrics_hub.h
index 8443ef65a..9575347a2 100644
--- a/lib/include/srslte/common/metrics_hub.h
+++ b/lib/include/srslte/common/metrics_hub.h
@@ -34,6 +34,7 @@ public:
   bool init(metrics_interface<metrics_t> *m_, float report_period_secs=1.0) {
     m = m_; 
     start_periodic(report_period_secs*1e6);
+    return true;
   }
   void stop() {
     thread_cancel();
@@ -47,7 +48,7 @@ private:
   void run_period() {
     metrics_t metric; 
     m->get_metrics(metric);
-    for (int i=0;i<listeners.size();i++) {
+    for (uint32_t i=0;i<listeners.size();i++) {
       listeners[i]->set_metrics(metric);
     }
   }