diff --git a/v3_13_0/CDT-crossResourceSubscription-v3_13_0.xsd b/v3_13_0/CDT-crossResourceSubscription-v3_13_0.xsd
index e6f5b3569c597877e88c8c5e0b055575e2fe61b2..3e56d61390ff9e8c6920dc3e174020701225fa22 100644
--- a/v3_13_0/CDT-crossResourceSubscription-v3_13_0.xsd
+++ b/v3_13_0/CDT-crossResourceSubscription-v3_13_0.xsd
@@ -44,7 +44,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 						<xs:element name="regularResourcesAsTarget" type="m2m:listOfURIs" minOccurs="0" />
 						<xs:element name="subscriptionResourcesAsTarget" type="m2m:listOfURIs" minOccurs="0" />
 						<xs:element name="timeWindowType" type="m2m:timeWindowType" />
-						<xs:element name="timeWindowSize" type="m2m:absRelTimestamp" />
+						<xs:element name="timeWindowSize" type="xs:duration" />
 						<xs:element name="eventNotificationCriteriaSet" type="m2m:eventNotificationCriteriaSet" minOccurs="0" />
 						<xs:element name="notificationEventCat" type="m2m:eventCat" minOccurs="0" />
 						<xs:element name="expirationCounter" type="xs:positiveInteger" minOccurs="0" />