diff --git a/posting.php b/posting.php
index dd4273aca..76dab203d 100644
--- a/posting.php
+++ b/posting.php
@@ -505,7 +505,9 @@ if (!IS_GUEST) {
 }
 
 // Anonymous mode
-$template->assign_var('SHOW_ANONYMOUS_CHECKBOX');
+if (!IS_GUEST) {
+    $template->assign_var('SHOW_ANONYMOUS_CHECKBOX');
+}
 
 $topic_type_toggle = '';
 if ($mode == 'newtopic' || ($mode == 'editpost' && $post_data['first_post'])) {