diff --git a/app/code/core/Mage/Eav/Model/Config/Source/Form.php b/app/code/core/Mage/Eav/Model/Config/Source/Form.php
index d2d6f2e4e..e82beb951 100644
--- a/app/code/core/Mage/Eav/Model/Config/Source/Form.php
+++ b/app/code/core/Mage/Eav/Model/Config/Source/Form.php
@@ -25,6 +25,8 @@ public function toOptionArray(string $entity = ''): array
         if ($node === false) {
             return [];
         }
+
+        $forms = [];
         foreach ($node->children() as $form) {
             $moduleName = $form->getAttribute('module') ?? 'eav';
             $translatedLabel = Mage::helper($moduleName)->__((string)$form->label[0]);