--- mqtt/src/Attic/conn.c	2011/12/09 11:46:48	1.1.2.12
+++ mqtt/src/Attic/conn.c	2011/12/13 10:12:36	1.1.2.13
@@ -285,7 +285,7 @@ mqtt_readCONNECT(mqtt_msg_t * __restrict buf, u_short 
 		var = (mqtthdr_var_t*) pos;
 	}
 	/* check init string & protocol */
-	if (var->var_sb.sb.l != 6 || strncmp(var->var_data, MQTT_CONN_STR, 6)) {
+	if (var->var_sb.sb.l != 6 || strncmp((char*) var->var_data, MQTT_CONN_STR, 6)) {
 		mqtt_SetErr(EINVAL, "Error:: invalid init string %.6s(%d)", 
 				var->var_data, var->var_sb.sb.l);
 		cack.retcode = MQTT_RETCODE_REFUSE_UNAVAIL;