diff --git a/openair-cn/S1AP/s1ap_eNB_decoder.c b/openair-cn/S1AP/s1ap_eNB_decoder.c
index 20bb4b67bc..d3ce2c1fcf 100644
--- a/openair-cn/S1AP/s1ap_eNB_decoder.c
+++ b/openair-cn/S1AP/s1ap_eNB_decoder.c
@@ -82,6 +82,8 @@ static int s1ap_eNB_decode_initiating_message(s1ap_message *message,
         default:
             S1AP_ERROR("Unknown procedure ID (%d) for initiating message\n",
                        (int)initiating_p->procedureCode);
+            AssertFatal( 0 , "Unknown procedure ID (%d) for initiating message\n",
+                       (int)initiating_p->procedureCode);
             return -1;
     }