diff -Nru collectd-3.7.0-orig/src/libping/ping.c collectd-3.7.0/src/libping/ping.c
--- collectd-3.7.0-orig/src/libping/ping.c	2006-01-30 22:59:21.000000000 +0100
+++ collectd-3.7.0/src/libping/ping.c	2006-01-31 14:10:45.000000000 +0100
@@ -172,11 +172,13 @@
     return -2;
   }
 
+  memset(buf, 0, sizeof(buf));
   icp = (struct icmp *)buf;
   icp->icmp_type  = ICMP_ECHO;
   icp->icmp_code  = 0;
   icp->icmp_cksum = 0;
   icp->icmp_id    = getpid() & 0xFFFF;
+  icp->icmp_seq   = icp->icmp_id;
   icp->icmp_cksum = in_checksum((u_short *)icp, len );
 
   if(( ss = sendto( datum->sock, buf, sizeof( buf ), 0,