diff --git a/zebra/rtadv.c b/zebra/rtadv.c
index 91d7b32..21ca6da 100644
--- a/zebra/rtadv.c
+++ b/zebra/rtadv.c
@@ -66,7 +66,7 @@
 
 static int if_join_all_router (int, struct interface *);
 static int if_leave_all_router (int, struct interface *);
-
+
 /* Structure which hold status of router advertisement. */
 struct rtadv
 {
@@ -80,7 +80,7 @@
 };
 
 struct rtadv *rtadv = NULL;
-
+
 static struct rtadv *
 rtadv_new (void)
 {
@@ -580,7 +580,7 @@
 
   return sock;
 }
-
+
 static struct rtadv_prefix *
 rtadv_prefix_new (void)
 {