diff --git a/lib/include/srslte/mac/pdu.h b/lib/include/srslte/mac/pdu.h
index e4d4d6800..6fe2d082e 100644
--- a/lib/include/srslte/mac/pdu.h
+++ b/lib/include/srslte/mac/pdu.h
@@ -456,7 +456,7 @@ private:
 class rar_pdu : public pdu<rar_subh>
 {
 public:
-  rar_pdu(uint32_t max_rars = 16, srslte::log_ref log_ = {});
+  rar_pdu(uint32_t max_rars = 16, srslte::log_ref log_ = srslte::logmap::get("MAC"));
 
   void    set_backoff(uint8_t bi);
   bool    has_backoff();