diff --git a/ripngd/ripng_interface.c b/ripngd/ripng_interface.c
index f5467f9..a7c9cef 100644
--- a/ripngd/ripng_interface.c
+++ b/ripngd/ripng_interface.c
@@ -94,7 +94,7 @@
       }
 
     if (ret < 0)
-      zlog_warn ("can't setsockopt IPV6_JOIN_GROUP: %s", strerror (errno));
+      zlog_warn ("can't setsockopt IPV6_JOIN_GROUP: %s", safe_strerror (errno));
 
     if (IS_RIPNG_DEBUG_EVENT)
       zlog_info ("RIPng %s join to all-rip-routers multicast group", ifp->name);
@@ -120,7 +120,7 @@
     ret = setsockopt (ripng->sock, IPPROTO_IPV6, IPV6_LEAVE_GROUP,
 		      (char *) &mreq, sizeof (mreq));
     if (ret < 0)
-      zlog_warn ("can't setsockopt IPV6_LEAVE_GROUP: %s\n", strerror (errno));
+      zlog_warn ("can't setsockopt IPV6_LEAVE_GROUP: %s\n", safe_strerror (errno));
 
     if (IS_RIPNG_DEBUG_EVENT)
       zlog_info ("RIPng %s leave from all-rip-routers multicast group",