diff --git a/openair3/NGAP/ngap_gNB_handlers.c b/openair3/NGAP/ngap_gNB_handlers.c
index 291508bb7b..71b4b55552 100644
--- a/openair3/NGAP/ngap_gNB_handlers.c
+++ b/openair3/NGAP/ngap_gNB_handlers.c
@@ -1555,7 +1555,7 @@ int ngap_gNB_handle_message(sctp_assoc_t assoc_id, int32_t stream, const uint8_t
   }
 
   /* Checking procedure Code and direction of message */
-  if (pdu.choice.initiatingMessage->procedureCode >= sizeof(ngap_messages_callback) / (3 * sizeof(ngap_message_decoded_callback)) || (pdu.present > NGAP_NGAP_PDU_PR_unsuccessfulOutcome)) {
+  if (pdu.choice.initiatingMessage->procedureCode >= (long)(sizeof(ngap_messages_callback) / (3 * sizeof(ngap_message_decoded_callback))) || (pdu.present > NGAP_NGAP_PDU_PR_unsuccessfulOutcome)) {
     NGAP_ERROR("[SCTP %u] Either procedureCode %ld or direction %d exceed expected\n", assoc_id, pdu.choice.initiatingMessage->procedureCode, pdu.present);
     ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_NGAP_NGAP_PDU, &pdu);
     return -1;