diff --git a/examples/readout/Sampler.cxx b/examples/readout/Sampler.cxx
index ba986d3d..edf5ce91 100644
--- a/examples/readout/Sampler.cxx
+++ b/examples/readout/Sampler.cxx
@@ -35,28 +35,23 @@ void Sampler::InitTask()
     fMsgSize = fConfig->GetValue<int>("msg-size");
     fMaxIterations = fConfig->GetValue<uint64_t>("max-iterations");
 
-    fRegion = FairMQUnmanagedRegionPtr(NewUnmanagedRegionFor("data1",
-                                                             0,
-                                                             10000000,
-                                                             [this](void* /*data*/, size_t /*size*/, void* /*hint*/) { // callback to be called when message buffers no longer needed by transport
-                                                                 --fNumUnackedMsgs;
-                                                                 if (fMaxIterations > 0)
-                                                                 {
-                                                                     LOG(debug) << "Received ack";
-                                                                 }
-                                                             }
-                                                             ));
+    fRegion = FairMQUnmanagedRegionPtr(NewUnmanagedRegion(10000000,
+                                                          [this](void* /*data*/, size_t /*size*/, void* /*hint*/) { // callback to be called when message buffers no longer needed by transport
+                                                              --fNumUnackedMsgs;
+                                                              if (fMaxIterations > 0)
+                                                              {
+                                                                  LOG(debug) << "Received ack";
+                                                              }
+                                                          }));
 }
 
 bool Sampler::ConditionalRun()
 {
-    FairMQMessagePtr msg(NewMessageFor("data1", // channel
-                                        0, // sub-channel
-                                        fRegion, // region
-                                        fRegion->GetData(), // ptr within region
-                                        fMsgSize, // offset from ptr
-                                        nullptr // hint
-                                        ));
+    FairMQMessagePtr msg(NewMessage(fRegion, // region
+                                    fRegion->GetData(), // ptr within region
+                                    fMsgSize, // offset from ptr
+                                    nullptr // hint
+                                    ));
 
     if (Send(msg, "data1", 0) > 0)
     {
diff --git a/examples/readout/fairmq-start-ex-readout.sh.in b/examples/readout/fairmq-start-ex-readout.sh.in
index cb576e9f..a55f86ed 100755
--- a/examples/readout/fairmq-start-ex-readout.sh.in
+++ b/examples/readout/fairmq-start-ex-readout.sh.in
@@ -11,6 +11,7 @@ fi
 SAMPLER="fairmq-ex-readout-sampler"
 SAMPLER+=" --id sampler1"
 SAMPLER+=" --severity debug"
+SAMPLER+=" --transport shmem"
 SAMPLER+=" --msg-size $msgSize"
 # SAMPLER+=" --rate 10"
 SAMPLER+=" --channel-config name=data1,type=pair,method=bind,address=tcp://127.0.0.1:7777,transport=shmem"
diff --git a/fairmq/FairMQDevice.h b/fairmq/FairMQDevice.h
index 0c6ba4f8..b4181e7d 100644
--- a/fairmq/FairMQDevice.h
+++ b/fairmq/FairMQDevice.h
@@ -227,9 +227,9 @@ class FairMQDevice
         return GetChannel(channel, index).NewSimpleMessage(data);
     }
 
-    FairMQUnmanagedRegionPtr NewUnmanagedRegion(const size_t size)
+    FairMQUnmanagedRegionPtr NewUnmanagedRegion(const size_t size, FairMQRegionCallback callback = nullptr)
     {
-        return Transport()->CreateUnmanagedRegion(size);
+        return Transport()->CreateUnmanagedRegion(size, callback);
     }
 
     FairMQUnmanagedRegionPtr NewUnmanagedRegionFor(const std::string& channel, int index, const size_t size, FairMQRegionCallback callback = nullptr)