diff --git a/CDT-responsePrimitive.xsd b/CDT-responsePrimitive.xsd
index 23e5f57a23661dae081948b0072a599997d5e1ff..bbda0f5597a97798cc6633eea08bdd155a58a7c8 100644
--- a/CDT-responsePrimitive.xsd
+++ b/CDT-responsePrimitive.xsd
@@ -163,7 +163,7 @@ 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>