diff --git a/schema/DatabaseSchema.xml b/schema/DatabaseSchema.xml
index 08c0f29bf5eb3e42344758725257a9d5b0c9ff45..e3168d3ad46ff7172860611cd3c184be582f9239 100644
--- a/schema/DatabaseSchema.xml
+++ b/schema/DatabaseSchema.xml
@@ -29,7 +29,6 @@
 		</field>
 		<field name="date_modified" type="T">
 			<notnull />
-			<deftimestamp />
 		</field>
 		<field name="modified_user_id" type="C" size="36" />
 		<field name="title" type="C" size="50" />