diff --git a/clients/opal/udp/models/send_receive/src/s2ss.c b/clients/opal/udp/models/send_receive/src/s2ss.c
index df23e5a93..4fa63cb9d 100644
--- a/clients/opal/udp/models/send_receive/src/s2ss.c
+++ b/clients/opal/udp/models/send_receive/src/s2ss.c
@@ -79,8 +79,8 @@ static void *SendToIPPort(void *arg)
 	unsigned int SendID = 1;
 	unsigned int ModelState;
 	unsigned int i, n;
-	unsigned short seq = 0;
 	int nbSend = 0;
+	uint32_t seq = 0;
 
 	/* Data from OPAL-RT model */
 	double mdldata[MSG_VALUES];