diff --git a/doctrine-mapping.xsd b/doctrine-mapping.xsd
index 680123fd0..f1f8db814 100644
--- a/doctrine-mapping.xsd
+++ b/doctrine-mapping.xsd
@@ -121,6 +121,7 @@
     <xs:restriction base="xs:token"> 
       <xs:enumeration value="EAGER"/> 
       <xs:enumeration value="LAZY"/>
+      <xs:enumeration value="EXTRALAZY"/>
     </xs:restriction> 
   </xs:simpleType>