diff --git a/src/Builder/ClassTemplate.php b/src/Builder/ClassTemplate.php
index 44ed59c..7190d48 100644
--- a/src/Builder/ClassTemplate.php
+++ b/src/Builder/ClassTemplate.php
@@ -70,7 +70,7 @@ if (! class_exists("%NAMESPACE%\%CLASSNAME%", false) ) {
             $result = [];
 
             foreach([ 'prepend', 'default', 'append' ] as $item) {
-                if ( ! is_array($this->sectionList[$name][$item]) ) continue;
+                if ( !isset($this->sectionList[$name][$item]) || ! is_array($this->sectionList[$name][$item]) ) continue;
 
                 usort($this->sectionList[$name][$item], fn($a, $b) => $a['order'] <=> $b['order']);