diff --git a/HISTORY b/HISTORY
index 730b1e3..6e709b6 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,6 +1,7 @@
 VDR Plugin 'streamdev' Revision History
 ---------------------------------------
 
+- silenced format mismatch warning on 64bit OS
 - added XBMC support by extending VTP capabilities (thanks to Alwin Esch)
 - now there's a common baseclass for all remuxers, make use of it
 - added cDevice::NumProvidedSystems() which was introduced in VDR 1.7.0
diff --git a/server/componentIGMP.c b/server/componentIGMP.c
index 946c513..d9f8811 100644
--- a/server/componentIGMP.c
+++ b/server/componentIGMP.c
@@ -1,5 +1,5 @@
 /*
- *  $Id: componentIGMP.c,v 1.1 2009/02/13 10:39:22 schmirl Exp $
+ *  $Id: componentIGMP.c,v 1.2 2009/07/03 21:44:19 schmirl Exp $
  */
 #include <netinet/ip.h>
 #include <netinet/igmp.h>
@@ -209,7 +209,7 @@ cServerConnection* cComponentIGMP::Accept(void)
 	igmp->igmp_cksum = 0;
 	if (chksum != inetChecksum((uint16_t *)igmp, ip_datalen))
 	{
-		esyslog("INVALID CHECKSUM %d %d %d %d 0x%x 0x%x", ntohs(ip->ip_len), ip_hdrlen, ip_datalen, recv_len, chksum, inetChecksum((uint16_t *)igmp, ip_datalen));
+		esyslog("INVALID CHECKSUM %d %d %d %lu 0x%x 0x%x", (int) ntohs(ip->ip_len), ip_hdrlen, ip_datalen, (unsigned long int) recv_len, chksum, inetChecksum((uint16_t *)igmp, ip_datalen));
 		return NULL;
 	}
 	logIGMP(igmp->igmp_type, ip->ip_src, ip->ip_dst, igmp->igmp_group);