diff --git a/core/modules/forum/forum.module b/core/modules/forum/forum.module
index f153179..0ffb472 100644
--- a/core/modules/forum/forum.module
+++ b/core/modules/forum/forum.module
@@ -1007,6 +1007,9 @@ function template_preprocess_forums(&$variables) {
         '#tid' => $variables['tid'],
       );
     }
+    else {
+      $variables['forums'] = array();
+    }
 
     if ($variables['tid'] && array_search($variables['tid'], config('forum.settings')->get('containers')) === FALSE) {
       $variables['topics'] = array(
@@ -1017,6 +1020,9 @@ function template_preprocess_forums(&$variables) {
         '#forum_per_page' => $variables['forum_per_page'],
       );
     }
+    else {
+      $variables['topics'] = array();
+    }
 
     // Provide separate template suggestions based on what's being output. Topic id is also accounted for.
     // Check both variables to be safe then the inverse. Forums with topic ID's take precedence.
@@ -1033,6 +1039,11 @@ function template_preprocess_forums(&$variables) {
     else {
       $variables['theme_hook_suggestions'][] = 'forums__' . $variables['tid'];
     }
+
+  }
+  else {
+    $variables['forums'] = array();
+    $variables['topics'] = array();
   }
 }