diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index ad4f5b1bc2..c6786eaa2b 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -5149,7 +5149,7 @@ static int copy_via_headers(struct sip_pvt *p, struct sip_request *req, const st
 /*! \brief Add route header into request per learned route */
 static void add_route(struct sip_request *req, struct sip_route *route)
 {
-	char r[BUFSIZ], *p;
+	char r[BUFSIZ*2], *p;
 	int n, rem = sizeof(r);
 
 	if (!route)