diff --git a/openair3/NAS/NR_UE/nr_nas_msg_sim.c b/openair3/NAS/NR_UE/nr_nas_msg_sim.c
index dfc0f64aa9..cf1897ae16 100644
--- a/openair3/NAS/NR_UE/nr_nas_msg_sim.c
+++ b/openair3/NAS/NR_UE/nr_nas_msg_sim.c
@@ -1261,6 +1261,9 @@ void *nas_nrue(void *args_p)
               offset++;
             }
           } break;
+	case FGS_PDU_SESSION_ESTABLISHMENT_REJ:
+	  LOG_E(NAS, "Received PDU Session Establishment reject\n");
+	  break;
           default:
             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 b5bb026c0b..a892bf1b4b 100644
--- a/openair3/NAS/NR_UE/nr_nas_msg_sim.h
+++ b/openair3/NAS/NR_UE/nr_nas_msg_sim.h
@@ -65,6 +65,7 @@
 // message type for 5GS session management
 #define FGS_PDU_SESSION_ESTABLISHMENT_REQ                  0b11000001 /* 193= 0xc1 */
 #define FGS_PDU_SESSION_ESTABLISHMENT_ACC                  0b11000010 /* 194= 0xc2 */
+#define FGS_PDU_SESSION_ESTABLISHMENT_REJ                  0b11000011 /* 195= 0xc3 */
 
 #define INITIAL_REGISTRATION                               0b001