diff --git a/doctrine-mapping.xsd b/doctrine-mapping.xsd
index bda7e5713..8f5152b88 100644
--- a/doctrine-mapping.xsd
+++ b/doctrine-mapping.xsd
@@ -67,6 +67,7 @@
       <xs:element name="field" type="orm:field" minOccurs="0" maxOccurs="unbounded"/>
       <xs:element name="one-to-one" type="orm:one-to-one" minOccurs="0" maxOccurs="unbounded"/>
       <xs:element name="one-to-many" type="orm:one-to-many" minOccurs="0" maxOccurs="unbounded" />
+      <xs:element name="many-to-one" type="orm:many-to-one" minOccurs="0" maxOccurs="unbounded" />
       <xs:element name="many-to-many" type="orm:many-to-many" minOccurs="0" maxOccurs="unbounded" />
     </xs:sequence>
     <xs:attribute name="name" type="xs:string" use="required" />
@@ -214,6 +215,7 @@
     </xs:sequence>
     <xs:attribute name="target-entity" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="field" type="xs:NMTOKEN" use="required" />
+    <xs:attribute name="mapped-by" type="xs:NMTOKEN" />
     <xs:attribute name="fetch" type="orm:fetch-type" default="LAZY" />
   </xs:complexType>
 
diff --git a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
index df340d838..b440745ec 100644
--- a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
+++ b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
@@ -316,7 +316,7 @@ class XmlDriver extends AbstractFileDriver
                     $mapping['fetch'] = constant('Doctrine\ORM\Mapping\AssociationMapping::FETCH_' . (string)$manyToManyElement['fetch']);
                 }
                 
-                if (isset($manyToManyElement['mappedBy'])) {
+                if (isset($manyToManyElement['mapped-by'])) {
                     $mapping['mappedBy'] = (string)$manyToManyElement['mapped-by'];
                 } else if (isset($manyToManyElement->{'join-table'})) {
                     $joinTableElement = $manyToManyElement->{'join-table'};