diff --git a/openair3/NAS/NR_UE/nr_nas_msg_sim.c b/openair3/NAS/NR_UE/nr_nas_msg_sim.c
index 6380713a19..e411c53994 100644
--- a/openair3/NAS/NR_UE/nr_nas_msg_sim.c
+++ b/openair3/NAS/NR_UE/nr_nas_msg_sim.c
@@ -1001,7 +1001,7 @@ void *nas_nrue_task(void *args_p)
       case NAS_CONN_RELEASE_IND:
         LOG_I(NAS, "[UE %ld] Received %s: cause %u\n", instance, ITTI_MSG_NAME (msg_p),
               NAS_CONN_RELEASE_IND (msg_p).cause);
-
+        itti_wait_tasks_unblock(); /* will unblock ITTI to stop nr-uesoftmodem */
         break;
 
       case NAS_UPLINK_DATA_CNF:
@@ -1051,6 +1051,9 @@ void *nas_nrue_task(void *args_p)
           case FGS_DOWNLINK_NAS_TRANSPORT:
             decodeDownlinkNASTransport(&initialNasMsg, pdu_buffer);
             break;
+          case FGS_DEREGISTRATION_ACCEPT:
+            LOG_I(NAS, "received deregistration accept\n");
+            break;
 	case FGS_PDU_SESSION_ESTABLISHMENT_ACC:
 	  {
 	    uint8_t offset = 0;
@@ -1082,7 +1085,7 @@ void *nas_nrue_task(void *args_p)
 	  }
 	  break;
           default:
-              LOG_W(NR_RRC,"unknow message type %d\n",msg_type);
+              LOG_W(NR_RRC,"unknown message type %d\n",msg_type);
               break;
         }
 
diff --git a/openair3/NAS/NR_UE/nr_nas_msg_sim.h b/openair3/NAS/NR_UE/nr_nas_msg_sim.h
index fbf071562d..fbf0362949 100644
--- a/openair3/NAS/NR_UE/nr_nas_msg_sim.h
+++ b/openair3/NAS/NR_UE/nr_nas_msg_sim.h
@@ -52,6 +52,7 @@
 #define REGISTRATION_ACCEPT                                0b01000010 /* 66 = 0x42 */
 #define REGISTRATION_COMPLETE                              0b01000011 /* 67 = 0x43 */
 #define FGS_DEREGISTRATION_REQUEST_UE_ORIGINATING          0b01000101
+#define FGS_DEREGISTRATION_ACCEPT                          0b01000110
 #define FGS_AUTHENTICATION_REQUEST                         0b01010110 /* 86 = 0x56 */
 #define FGS_AUTHENTICATION_RESPONSE                        0b01010111 /* 87 = 0x57 */
 #define FGS_IDENTITY_REQUEST                               0b01011011 /* 91 = 0x5b */