diff --git a/app/code/core/Mage/Adminhtml/Model/System/Config/Backend/Admin/Observer.php b/app/code/core/Mage/Adminhtml/Model/System/Config/Backend/Admin/Observer.php
index 3686a208d25..39d40d0be7c 100644
--- a/app/code/core/Mage/Adminhtml/Model/System/Config/Backend/Admin/Observer.php
+++ b/app/code/core/Mage/Adminhtml/Model/System/Config/Backend/Admin/Observer.php
@@ -58,8 +58,7 @@ public function beforeRenderModuleList(Varien_Event_Observer $observer): void
         $data = $modules->getData();
         /** @var Mage_Core_Model_Config_Element $module */
         foreach ($data as $index => $module) {
-            $module = $module->asArray();
-            if ($module['active'] === 'false') {
+            if ($module->active === 'false') {
                 unset($data[$index]);
             }
         }
diff --git a/tests/unit/Mage/Adminhtml/Block/System/Config/Form/Fieldset/Modules/DisableOutputTest.php b/tests/unit/Mage/Adminhtml/Block/System/Config/Form/Fieldset/Modules/DisableOutputTest.php
index 230fa611c1b..05cf7aa8bc6 100644
--- a/tests/unit/Mage/Adminhtml/Block/System/Config/Form/Fieldset/Modules/DisableOutputTest.php
+++ b/tests/unit/Mage/Adminhtml/Block/System/Config/Form/Fieldset/Modules/DisableOutputTest.php
@@ -39,7 +39,7 @@ public function setUp(): void
      */
     public function testGetModulesCount(): void
     {
-        $this->assertSame(61, count($this->subject->getModules()));
+        $this->assertSame(60, count($this->subject->getModules()));
     }
 
     /**