--- srtp/crypto/replay/rdb.c.orig	2012-03-20 14:52:32.890017830 +0100
+++ srtp/crypto/replay/rdb.c	2012-03-20 14:56:31.670017835 +0100
@@ -115,7 +115,7 @@
 
     /* shift the window forward by delta bits*/
     v128_left_shift(&rdb->bitmask, delta);
-    v128_set_bit(&rdb->bitmask, rdb_bits_in_bitmask-delta);
+    v128_set_bit(&rdb->bitmask, rdb_bits_in_bitmask-1);
     rdb->window_start += delta;
 
   }