diff --git a/config/alfresco/dbscripts/create/2.2/org.hibernate.dialect.Dialect/AlfrescoPostCreate-2.2-MappedFKIndexes.sql b/config/alfresco/dbscripts/create/2.2/org.hibernate.dialect.Dialect/AlfrescoPostCreate-2.2-MappedFKIndexes.sql
index 2eb5b4e0be..7d7854d62e 100644
--- a/config/alfresco/dbscripts/create/2.2/org.hibernate.dialect.Dialect/AlfrescoPostCreate-2.2-MappedFKIndexes.sql
+++ b/config/alfresco/dbscripts/create/2.2/org.hibernate.dialect.Dialect/AlfrescoPostCreate-2.2-MappedFKIndexes.sql
@@ -62,6 +62,8 @@ CREATE INDEX fk_alf_store_root ON alf_store (root_node_id);
 
 CREATE INDEX fk_alf_txn_svr ON alf_transaction (server_id);
 
+CREATE INDEX fk_alf_usaged_n ON alf_usage_delta (node_id);
+
 CREATE INDEX fk_alf_vc_store ON alf_version_count (store_id);
 
 CREATE INDEX fk_avm_nasp_n ON avm_aspects (node_id);
diff --git a/source/java/org/alfresco/repo/domain/hibernate/UsageDelta.hbm.xml b/source/java/org/alfresco/repo/domain/hibernate/UsageDelta.hbm.xml
index 4a24851750..bfebe7bfc2 100644
--- a/source/java/org/alfresco/repo/domain/hibernate/UsageDelta.hbm.xml
+++ b/source/java/org/alfresco/repo/domain/hibernate/UsageDelta.hbm.xml
@@ -35,13 +35,13 @@
       
       <!-- forward assoc to node -->
       <many-to-one
-            name="node"
-            not-null="true"
+            name="node"
+            not-null="true"
+            column="node_id"
             lazy="proxy"
-            class="org.alfresco.repo.domain.hibernate.NodeImpl"
-            fetch="select" >
-         <column name="node_id" />
-      </many-to-one>
+            class="org.alfresco.repo.domain.hibernate.NodeImpl"
+            foreign-key="fk_alf_usaged_n"
+            fetch="select" />
 
       <property name="deltaSize" column="delta_size" type="long" not-null="true"/>