diff --git a/isisd/isis_lsp.c b/isisd/isis_lsp.c
index 63f2b6b..1a4deb1 100644
--- a/isisd/isis_lsp.c
+++ b/isisd/isis_lsp.c
@@ -727,10 +727,10 @@
 #ifdef HAVE_IPV6
   struct ipv6_reachability *ipv6_reach;
   struct in6_addr in6;
+  u_char buff[BUFSIZ];
 #endif
   u_char LSPid[255];
   u_char hostname[255];
-  u_char buff[BUFSIZ];
   u_char ipv4_reach_prefix[20];
   u_char ipv4_reach_mask[20];
   u_char ipv4_address[20];