diff --git a/lib/Doctrine/ORM/Tools/EntityGenerator.php b/lib/Doctrine/ORM/Tools/EntityGenerator.php
index 8d1f05ac1..5bc292a37 100644
--- a/lib/Doctrine/ORM/Tools/EntityGenerator.php
+++ b/lib/Doctrine/ORM/Tools/EntityGenerator.php
@@ -1731,7 +1731,7 @@ public function __construct(<params>)
 
             $embedded = ['class="' . $embeddedClass['class'] . '"'];
 
-            if (isset($fieldMapping['columnPrefix'])) {
+            if (isset($embeddedClass['columnPrefix'])) {
                 $embedded[] = 'columnPrefix=' . var_export($embeddedClass['columnPrefix'], true);
             }