diff --git a/include/sidebar.php b/include/sidebar.php
index 527ee06..a830b58 100644
--- a/include/sidebar.php
+++ b/include/sidebar.php
@@ -20,7 +20,7 @@ function global_sidebar_menu() {
     $g->done();    
 
     $g = new htmlmenu("Search");
-    $g->addmisc(app_search_box($_REQUEST['q']));
+    $g->addmisc(app_search_box(isset($_REQUEST['q']) ? $_REQUEST['q'] : ''));
     $g->done();
 
 }