diff --git a/src/etc/inc/plugins.inc.d/unbound.inc b/src/etc/inc/plugins.inc.d/unbound.inc
index 4f2d8919f..7ce748f22 100644
--- a/src/etc/inc/plugins.inc.d/unbound.inc
+++ b/src/etc/inc/plugins.inc.d/unbound.inc
@@ -393,7 +393,7 @@ function unbound_cache_flush()
     configd_run('unbound cache flush');
 }
 
-function unbound_configure_do($verbose = false, $interface = '')
+function unbound_configure_do($verbose = false, $unused = '')
 {
     global $config;