diff --git a/zebra/debug.c b/zebra/debug.c
index fc99623..8575a66 100644
--- a/zebra/debug.c
+++ b/zebra/debug.c
@@ -201,7 +201,7 @@
   1
 };
 
-int
+static int
 config_write_debug (struct vty *vty)
 {
   int write = 0;
@@ -242,7 +242,7 @@
 }
 
 void
-zebra_debug_init ()
+zebra_debug_init (void)
 {
   zebra_debug_event = 0;
   zebra_debug_packet = 0;