diff --git a/src/vnet/fib/ip4_fib.c b/src/vnet/fib/ip4_fib.c
index 29d121c..5b12aa6 100644
--- a/src/vnet/fib/ip4_fib.c
+++ b/src/vnet/fib/ip4_fib.c
@@ -182,7 +182,7 @@
     /*
      * validate no more routes.
      */
-#ifdef CLIB_DEBUG
+#if CLIB_DEBUG > 0
     if (0 != fib_table->ft_total_route_counts)
         fib_table_assert_empty(fib_table);
 #endif