diff --git a/zebra/misc_null.c b/zebra/misc_null.c
index b6a124f..7359430 100644
--- a/zebra/misc_null.c
+++ b/zebra/misc_null.c
@@ -3,7 +3,9 @@
 #include "prefix.h"
 #include "zebra/rtadv.h"
 #include "zebra/irdp.h"
+#include "zebra/interface.h"
 
 void ifstat_update_proc (void) { return; }
 #pragma weak rtadv_config_write = ifstat_update_proc
 #pragma weak irdp_config_write = ifstat_update_proc
+#pragma weak ifstat_update_sysctl = ifstat_update_proc