diff --git a/ospf6d/ospf6_main.c b/ospf6d/ospf6_main.c
index 680f4b7..73d9150 100644
--- a/ospf6d/ospf6_main.c
+++ b/ospf6d/ospf6_main.c
@@ -125,14 +125,14 @@
 }
 
 /* SIGHUP handler. */
-void 
+static void 
 sighup (void)
 {
   zlog_info ("SIGHUP received");
 }
 
 /* SIGINT handler. */
-void
+static void
 sigint (void)
 {
   zlog_notice ("Terminating on signal SIGINT");
@@ -140,7 +140,7 @@
 }
 
 /* SIGTERM handler. */
-void
+static void
 sigterm (void)
 {
   zlog_notice ("Terminating on signal SIGTERM");
@@ -148,7 +148,7 @@
 }
 
 /* SIGUSR1 handler. */
-void
+static void
 sigusr1 (void)
 {
   zlog_info ("SIGUSR1 received");