diff --git a/lib/include/srslte/interfaces/ue_interfaces.h b/lib/include/srslte/interfaces/ue_interfaces.h
index 0dd0cb5be..17e84f7d5 100644
--- a/lib/include/srslte/interfaces/ue_interfaces.h
+++ b/lib/include/srslte/interfaces/ue_interfaces.h
@@ -533,7 +533,7 @@ public:
   {
   public:
     // Default constructor with default values as in 36.331 9.2.2
-    mac_cfg_t() { time_alignment_timer = -1; }
+    mac_cfg_t() { set_defaults(); }
 
     void set_defaults()
     {
@@ -545,6 +545,15 @@ public:
       time_alignment_timer = -1;
     }
 
+    void set_mac_main_cfg_default()
+    {
+      bsr_cfg.reset();
+      phr_cfg.reset();
+      sr_cfg.reset();
+      harq_cfg.reset();
+      time_alignment_timer = -1;
+    }
+
     // Called only if section is present
     void set_sched_request_cfg(asn1::rrc::sched_request_cfg_c& cfg)
     {
diff --git a/srsue/src/stack/rrc/rrc.cc b/srsue/src/stack/rrc/rrc.cc
index 1b841711d..3e6153e67 100644
--- a/srsue/src/stack/rrc/rrc.cc
+++ b/srsue/src/stack/rrc/rrc.cc
@@ -2741,7 +2741,7 @@ void rrc::log_mac_config_dedicated()
 void rrc::apply_mac_config_dedicated_default()
 {
   rrc_log->info("Set MAC default configuration\n");
-  current_mac_cfg.set_defaults();
+  current_mac_cfg.set_mac_main_cfg_default();
   mac->set_config(current_mac_cfg);
   log_mac_config_dedicated();
 }