Index: res/res_rtp_asterisk.c
===================================================================
--- res/res_rtp_asterisk.c	(revision 385881)
+++ res/res_rtp_asterisk.c	(working copy)
@@ -749,7 +749,7 @@
 {
 	struct ast_rtp *rtp = ast_rtp_instance_get_data(instance);
 	struct ast_sockaddr remote_address = { {0,} };
-	int hdrlen = 12, res = 0, i = 0;
+	int hdrlen = 12, res = -1, i = 0;
 	char data[256];
 	unsigned int *rtpheader = (unsigned int*)data;
 	unsigned int measured_samples;
@@ -758,7 +758,7 @@
 
 	/* Make sure we know where the remote side is so we can send them the packet we construct */
 	if (ast_sockaddr_isnull(&remote_address)) {
-		return -1;
+		goto cleanup;
 	}
 
 	/* Convert the given digit to the one we are going to send */
@@ -774,7 +774,7 @@
 		digit = digit - 'a' + 12;
 	} else {
 		ast_log(LOG_WARNING, "Don't know how to represent '%c'\n", digit);
-		return -1;
+		goto cleanup;
 	}
 
 	rtp->dtmfmute = ast_tvadd(ast_tvnow(), ast_tv(0, 500000));
@@ -809,13 +809,15 @@
 
 		rtp->seqno++;
 	}
+	res = 0;
 
 	/* Oh and we can't forget to turn off the stuff that says we are sending DTMF */
 	rtp->lastts += rtp->send_duration;
+cleanup:
 	rtp->sending_digit = 0;
 	rtp->send_digit = 0;
 
-	return 0;
+	return res;
 }
 
 static int ast_rtp_dtmf_end(struct ast_rtp_instance *instance, char digit)