diff --git a/srsenb/hdr/stack/mac/mac_nr.h b/srsenb/hdr/stack/mac/mac_nr.h
index 0995e6dc6..1fb78b520 100644
--- a/srsenb/hdr/stack/mac/mac_nr.h
+++ b/srsenb/hdr/stack/mac/mac_nr.h
@@ -51,7 +51,7 @@ public:
             rrc_interface_mac_nr*   rrc_);
   void stop();
 
-  void get_metrics(std::vector<srsenb::mac_metrics_t>& metrics);
+  void get_metrics(srsenb::mac_metrics_t& metrics);
 
   // MAC interface for RRC
   int cell_cfg(srsenb::sched_interface::cell_cfg_t* cell_cfg);
diff --git a/srsenb/src/stack/mac/mac_nr.cc b/srsenb/src/stack/mac/mac_nr.cc
index 495b0f490..05c284bba 100644
--- a/srsenb/src/stack/mac/mac_nr.cc
+++ b/srsenb/src/stack/mac/mac_nr.cc
@@ -76,7 +76,7 @@ void mac_nr::stop()
   }
 }
 
-void mac_nr::get_metrics(std::vector<srsenb::mac_metrics_t>& metrics) {}
+void mac_nr::get_metrics(srsenb::mac_metrics_t& metrics) {}
 
 // Fills both, DL_CONFIG.request and TX.request structs
 void mac_nr::get_dl_config(const uint32_t                               tti,