diff --git a/CDT-responsePrimitive-v0_8_0.xsd b/CDT-responsePrimitive-v0_8_0.xsd
index db3052a62d934c0bb57ecd82e04101b56bedef05..dd4f9b3dc35eac27426b88dbf71f8b80d6331831 100644
--- a/CDT-responsePrimitive-v0_8_0.xsd
+++ b/CDT-responsePrimitive-v0_8_0.xsd
@@ -65,7 +65,7 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
   
   <xs:complexType name="aggregatedResponse">    
     <xs:sequence>      
-      <xs:element ref="m2m:responsePrimitive" minOccurs="0" maxOccurs="unbounded"/>      
+      <xs:element ref="m2m:responsePrimitive" minOccurs="1" maxOccurs="unbounded"/>      
     </xs:sequence> 	       
   </xs:complexType>