diff --git a/modeling/MBED_AsynchronousSignaling.ttool/MBED_AsynchronousSignaling.xml b/modeling/MBED_AsynchronousSignaling.ttool/MBED_AsynchronousSignaling.xml
index 16db049be6d7d83551170b173002f647245255bc..8fc33f9264fb63e0033de5fdf2b80ae1691b5819 100644
--- a/modeling/MBED_AsynchronousSignaling.ttool/MBED_AsynchronousSignaling.xml
+++ b/modeling/MBED_AsynchronousSignaling.ttool/MBED_AsynchronousSignaling.xml
@@ -10,7 +10,7 @@
 <MainCode value="  serialPort_global.printf(&quot;ValueGenerator\tValueReceiver\r\n&quot;);"/>
 <MainCode value="}"/>
 <Optimized value="true" />
-<Validated value="" />
+<Validated value="ValueReceiver;ValueGenerator;" />
 <Ignored value="" />
 
 <CONNECTOR type="5002" id="2" >
@@ -24,7 +24,7 @@
 <extraparam>
 <isd value="in receiveSignal(int value)" />
 <oso value="out sendSignal(int value)" />
-<FIFOType asynchronous="true" size="3" blocking="false" private="true" broadcast="false" lossy="false" />
+<FIFOType asynchronous="true" size="3" blocking="true" private="true" broadcast="false" lossy="false" />
 </extraparam>
 </CONNECTOR>
 <COMPONENT type="5000" id="27" >