diff --git a/v3_18_0/CDT-triggerPayload-v3_18_0.xsd b/v3_18_0/CDT-triggerPayload-v3_18_0.xsd
index 6a1758fe827e7e408d8ae8693db0a7dbcacd34f1..d0d663d8066efd2ec5d2c274355e63cab5b4f247 100644
--- a/v3_18_0/CDT-triggerPayload-v3_18_0.xsd
+++ b/v3_18_0/CDT-triggerPayload-v3_18_0.xsd
@@ -39,16 +39,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 				<xs:element name="triggerInfoOperation" type="m2m:operation" minOccurs="0"/>
 				<xs:element name="targetedResourceType" type="m2m:resourceType" minOccurs="0"/>
 				<xs:element name="triggerInfoAE-ID" type="m2m:ID" minOccurs="0"/>
-				<xs:element name="triggerInfoSerializationTypes" minOccurs="0">      
-					<xs:simpleType>
-						<xs:restriction> 
-							<xs:simpleType> 
-								<xs:list itemType="m2m:serializationType"/> 
-							</xs:simpleType> 				
-							<xs:minLength value="1"/> 
-						</xs:restriction> 
-					</xs:simpleType>
-				</xs:element>
+				<xs:element name="triggerInfoSerializationTypes" type="m2m:serializations" minOccurs="0"/>
 			</xs:sequence>
 		</xs:complexType>
 	</xs:element>