diff --git a/isisd/topology/random.c b/isisd/topology/random.c
index 6ee17a0..c49c082 100644
--- a/isisd/topology/random.c
+++ b/isisd/topology/random.c
@@ -10,7 +10,17 @@
 #include <sys/types.h>
 #include <sys/times.h>
 
-unsigned long timer()
+/*
+ * Prototypes.
+ */
+unsigned long timer(void);
+void init_rand(long);
+double rand01(void);
+double randg01(void);
+long nrand(long);
+void free_arc(void *);
+
+unsigned long timer ()
    { struct tms hold;
 
         times(&hold);
diff --git a/isisd/topology/spgrid.c b/isisd/topology/spgrid.c
index a1aa6d7..611b672 100644
--- a/isisd/topology/spgrid.c
+++ b/isisd/topology/spgrid.c
@@ -26,6 +26,15 @@
 
 #define NODE( x, y ) (x*Y + y + 1)
 
+/*
+ * Prototypes.
+ */
+void free_arc(void *);
+void help(struct vty *);
+void print_arc(struct vty *, struct list *, long, long, long);
+void hhelp(struct vty *);
+void usage(struct vty *);
+
 const char   *graph_type[] =  {
   "double cycle",
   "cycle",