diff --git a/src/Core/CustomMethods.php b/src/Core/CustomMethods.php
index 91b3038ea..1f166dd8b 100644
--- a/src/Core/CustomMethods.php
+++ b/src/Core/CustomMethods.php
@@ -279,6 +279,10 @@ trait CustomMethods
         $methods = $this->findMethodsFromExtension($extension);
         if ($methods) {
             foreach ($methods as $method) {
+                if (!isset(self::$extra_methods[$class][$method])) {
+                    continue;
+                }
+                    
                 $methodInfo = self::$extra_methods[$class][$method];
 
                 if ($methodInfo['property'] === $property && $methodInfo['index'] === $index) {