--- channels/chan_sip.c.orig	2009-04-14 08:58:13.000000000 +0100
+++ channels/chan_sip.c	2009-04-14 09:00:58.000000000 +0100
@@ -16287,7 +16287,6 @@
 restartsearch:		
 		/* Check for interfaces needing to be killed */
 		ast_mutex_lock(&iflock);
-		t = time(NULL);
 		/* don't scan the interface list if it hasn't been a reasonable period
 		   of time since the last time we did it (when MWI is being sent, we can
 		   get back to this point every millisecond or less)
@@ -16306,12 +16305,14 @@
 			    (sip->owner->_state == AST_STATE_UP) &&
 			    !sip->redirip.sin_addr.s_addr &&
 			    sip->t38.state != T38_ENABLED) {
+				t = time(NULL);
 				if (sip->lastrtptx &&
 				    ast_rtp_get_rtpkeepalive(sip->rtp) &&
 				    (t > sip->lastrtptx + ast_rtp_get_rtpkeepalive(sip->rtp))) {
 					/* Need to send an empty RTP packet */
 					sip->lastrtptx = time(NULL);
 					ast_rtp_sendcng(sip->rtp, 0);
+					t = time(NULL);
 				}
 				if (sip->lastrtprx &&
 					(ast_rtp_get_rtptimeout(sip->rtp) || ast_rtp_get_rtpholdtimeout(sip->rtp)) &&