diff --git a/CDT-responsePrimitive.xsd b/CDT-responsePrimitive.xsd
index 2f2643731e7dda9881062a64c0be17d1d69135f4..7d3583781cdcc852e0c430c80efc1de4a399e905 100644
--- a/CDT-responsePrimitive.xsd
+++ b/CDT-responsePrimitive.xsd
@@ -166,7 +166,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
   
   <xs:complexType name="listOfChildResourceRef">    
     <xs:sequence>  
-      <xs:element name="resourceRef" type="m2m:childResourceRef" minOccurs="1" maxOccurs="unbounded" />
+      <xs:element name="resourceRef" type="m2m:childResourceRef" minOccurs="0" maxOccurs="unbounded" />
     </xs:sequence> 	       
   </xs:complexType>