diff --git a/openair-cn/GTPV1-U/nw-gtpv1u/src/NwGtpv1uMsg.c b/openair-cn/GTPV1-U/nw-gtpv1u/src/NwGtpv1uMsg.c
index 0b416446e3..8d59bf6ade 100644
--- a/openair-cn/GTPV1-U/nw-gtpv1u/src/NwGtpv1uMsg.c
+++ b/openair-cn/GTPV1-U/nw-gtpv1u/src/NwGtpv1uMsg.c
@@ -136,7 +136,10 @@ nwGtpv1uGpduMsgNew( NW_IN NwGtpv1uStackHandleT hGtpuStackHandle,
     if(pMsg) {
         msgExtraLen        = (((seqNumFlag) || (NW_FALSE) || (NW_FALSE) ) ?
                                 (NW_GTPV1U_EPC_SPECIFIC_HEADER_SIZE - NW_GTPV1U_EPC_MIN_HEADER_SIZE)  : 0);
-        AssertFatal((msgExtraLen + NW_GTPV1U_EPC_MIN_HEADER_SIZE) <= tpduOffset, "Mismatch GTPU len");
+        AssertFatal((msgExtraLen + NW_GTPV1U_EPC_MIN_HEADER_SIZE) <= tpduOffset,
+                "Mismatch GTPU len, msgExtraLen %u tpduOffset %u",
+                msgExtraLen,
+                tpduOffset);
         pMsg->msgBuf       = tpdu;
         pMsg->msgBufLen    = tpduLength + msgExtraLen + NW_GTPV1U_EPC_MIN_HEADER_SIZE;
         pMsg->msgBufOffset = tpduOffset - (msgExtraLen + NW_GTPV1U_EPC_MIN_HEADER_SIZE);