--- rtmpdump/librtmp/handshake.h.orig	2014-03-02 18:20:23.000000000 +0000
+++ rtmpdump/librtmp/handshake.h	2014-03-12 09:26:06.474683800 +0000
@@ -134,6 +134,7 @@
   HMAC_setup(ctx, secretKey, 128);
   HMAC_crunch(ctx, pubKeyOut, 128);
   HMAC_finish(ctx, digest, digestLen);
+  (void) digestLen;
 
   RTMP_Log(RTMP_LOGDEBUG, "RC4 In Key: ");
   RTMP_LogHex(RTMP_LOGDEBUG, digest, 16);
