diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 0994b04ba0..ccde563b1a 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -113,7 +113,7 @@ static char *tdesc = "Session Initiation Protocol (SIP)";
 static char *config = "sip.conf";
 
 #define DEFAULT_SIP_PORT	5060	/* From RFC 2543 */
-#define SIP_MAX_PACKET	1500		/* Also from RFC 2543, should sub headers tho */
+#define SIP_MAX_PACKET	4096		/* Also from RFC 2543, should sub headers tho */
 
 #define ALLOWED_METHODS "INVITE, ACK, CANCEL, OPTIONS, BYE, REFER"