diff --git a/OneM2M_Testcases.ttcn b/OneM2M_Testcases.ttcn
index f95bf242fef7f9ac1e4cbf551a1e2c65062efd4f..1cb788b6505192abc536fba725651c060aa42f25 100644
--- a/OneM2M_Testcases.ttcn
+++ b/OneM2M_Testcases.ttcn
@@ -4690,7 +4690,7 @@ module OneM2M_Testcases {
                             if(not ispresent(v_response.primitive.responsePrimitive.primitiveContent.any_1[0].Group_optional.memberTypeValidated)){
                                 setverdict(fail, testcasename(), ": Error, memberTypeValidated attribute not provided");
                             } else {
-                                if(v_response.primitive.responsePrimitive.primitiveContent.any_1[0].Group_optional.memberTypeValidated == false){
+                                if(v_response.primitive.responsePrimitive.primitiveContent.any_1[0].Group_optional.memberTypeValidated != false){
                                     setverdict(fail, testcasename(), ": Error, memberTypeValidated attribute not correct");
                                 }
                             }