diff --git a/ripd/ripd.c b/ripd/ripd.c
index b42ca72..b708889 100644
--- a/ripd/ripd.c
+++ b/ripd/ripd.c
@@ -1168,7 +1168,8 @@
   struct prefix_ipv4 ifaddr;
   struct prefix_ipv4 ifaddrclass;
   int subnetted;
-      
+
+  memset(&ifaddr, 0, sizeof(ifaddr));
   /* We don't know yet. */
   subnetted = -1;