diff --git a/isisd/isis_adjacency.c b/isisd/isis_adjacency.c
index a6f9cba..87609f6 100644
--- a/isisd/isis_adjacency.c
+++ b/isisd/isis_adjacency.c
@@ -49,7 +49,7 @@
 
 extern struct isis *isis;
 
-struct isis_adjacency *
+static struct isis_adjacency *
 adj_alloc (u_char * id)
 {
   struct isis_adjacency *adj;
@@ -293,7 +293,7 @@
   return 0;
 }
 
-const char *
+static const char *
 adj_state2string (int state)
 {
 
@@ -315,7 +315,7 @@
 /*
  * show clns/isis neighbor (detail)
  */
-void
+static void
 isis_adj_print_vty2 (struct isis_adjacency *adj, struct vty *vty, char detail)
 {