diff --git a/isisd/isis_dr.c b/isisd/isis_dr.c
index e33e78b..4eadc9c 100644
--- a/isisd/isis_dr.c
+++ b/isisd/isis_dr.c
@@ -103,7 +103,7 @@
   return ISIS_OK;
 }
 
-int
+static int
 isis_check_dr_change (struct isis_adjacency *adj, int level)
 {
   int i;