diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index 7eb15dfe6a201365d916444a6d36082020824d79..8db81f0711489165a45b1e46b8c0343094c71cef 100644
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -170,7 +170,7 @@ static int iaxdefaultdpcache=10 * 60;	/* Cache dialplan entries for 10 minutes b
 
 static int iaxdefaulttimeout = 5;		/* Default to wait no more than 5 seconds for a reply to come back */
 
-static int tos = 0;
+static unsigned int tos = 0;
 
 static int min_reg_expire;
 static int max_reg_expire;