diff --git a/ripd/ripd.c b/ripd/ripd.c
index 0407065..c5baf8a 100644
--- a/ripd/ripd.c
+++ b/ripd/ripd.c
@@ -1632,7 +1632,7 @@
   if (ret < 0)
     return ret;
 
-  for (ptr = CMSG_FIRSTHDR(&msg); ptr != NULL; ptr = CMSG_NXTHDR(&msg, ptr))
+  for (ptr = ZCMSG_FIRSTHDR(&msg); ptr != NULL; ptr = CMSG_NXTHDR(&msg, ptr))
     if (ptr->cmsg_level == IPPROTO_IP && ptr->cmsg_type == IP_PKTINFO) 
       {
 	struct in_pktinfo *pktinfo;