diff --git a/zebra/irdp_packet.c b/zebra/irdp_packet.c
index 28dc171..5052504 100644
--- a/zebra/irdp_packet.c
+++ b/zebra/irdp_packet.c
@@ -287,7 +287,7 @@
   if (!(ifp->flags & IFF_UP))
     return;
 
-  if (!p) 
+  if (p)
     src = ntohl(p->u.prefix4.s_addr);
   else 
     src = 0; /* Is filled in */