diff --git a/module/custom/control.php b/module/custom/control.php
index 7d1312a0ca..b0fef49269 100644
--- a/module/custom/control.php
+++ b/module/custom/control.php
@@ -353,7 +353,7 @@ class custom extends control
         $this->lang->navGroup->custom = 'system';
         $this->lang->system->menu->company['subModule'] .= ',custom';
         $key = array_search('custom', $this->lang->noMenuModule);
-        unset($this->lang->noMenuModule[$key]);
+        if($key !== false) unset($this->lang->noMenuModule[$key]);
 
         $unit = zget($this->config->custom, 'hourPoint', '1');
 
@@ -412,7 +412,7 @@ class custom extends control
         $this->lang->navGroup->custom = 'system';
         $this->lang->system->menu->company['subModule'] .= ',custom';
         $key = array_search('custom', $this->lang->noMenuModule);
-        unset($this->lang->noMenuModule[$key]);
+        if($key !== false) unset($this->lang->noMenuModule[$key]);
 
         $this->view->title      = $this->lang->custom->browseStoryConcept;
         $this->view->position[] = $this->lang->custom->browseStoryConcept;
diff --git a/module/product/control.php b/module/product/control.php
index 611fa62b57..ca6f6dc6ef 100644
--- a/module/product/control.php
+++ b/module/product/control.php
@@ -429,7 +429,7 @@ class product extends control
         $this->product->setMenu($this->products, $productID);
 
         $moduleIndex = array_search('product', $this->lang->noMenuModule);
-        unset($this->lang->noMenuModule[$moduleIndex]);
+        if($moduleIndex !== false) unset($this->lang->noMenuModule[$moduleIndex]);
 
         if($programID)
         {
@@ -602,7 +602,7 @@ class product extends control
         if(!$product) die(js::error($this->lang->notFound) . js::locate('back'));
 
         $moduleIndex = array_search('product', $this->lang->noMenuModule);
-        unset($this->lang->noMenuModule[$moduleIndex]);
+        if($moduleIndex !== false) unset($this->lang->noMenuModule[$moduleIndex]);
         $this->lang->product->menu = $this->lang->product->viewMenu;
         $this->lang->product->switcherMenu   = $this->loadModel('product')->getSwitcher($productID);
         $this->lang->product->mainMenuAction = $this->product->getProductMainAction();
diff --git a/module/story/control.php b/module/story/control.php
index db26accf8e..26e29e6076 100644
--- a/module/story/control.php
+++ b/module/story/control.php
@@ -642,7 +642,7 @@ class story extends control
             /* The stories of a project. */
             $this->lang->navGroup->story = 'project';
             $moduleIndex = array_search('story', $this->lang->noMenuModule);
-            unset($this->lang->noMenuModule[$moduleIndex]);
+            if($moduleIndex !== false) unset($this->lang->noMenuModule[$moduleIndex]);
             $this->lang->story->menu = $this->lang->project->menu;
 
             $this->project->setMenu($this->project->getExecutionPairs($this->session->PRJ, 'all', 'nodeleted'), $projectID);