--- asterisk-orig/main/rtp.c	2007-02-09 10:31:52.000000000 -0800
+++ asterisk/main/rtp.c	2007-02-20 11:07:55.000000000 -0800
@@ -1101,5 +1101,5 @@
 	payload = (seqno & 0x7f0000) >> 16;
 	padding = seqno & (1 << 29);
-	mark = seqno & (1 << 23);
+	mark = (seqno & 0x800000) >> 23;
 	ext = seqno & (1 << 28);
 	seqno &= 0xffff;