diff --git a/examples/MQ/4-copypush/FairMQExample4Sampler.cxx b/examples/MQ/4-copypush/FairMQExample4Sampler.cxx
index 515b7870..71c50be1 100644
--- a/examples/MQ/4-copypush/FairMQExample4Sampler.cxx
+++ b/examples/MQ/4-copypush/FairMQExample4Sampler.cxx
@@ -36,7 +36,7 @@ void FairMQExample4Sampler::Run()
 
         std::unique_ptr<FairMQMessage> msg(NewMessage(number, // data pointer
                                                       sizeof(uint64_t), // data size
-                                                      [](void* data, void* hint){ delete static_cast<uint64_t*>(data); } // callback to deallocate after the transfer
+                                                      [](void* data, void* /*hint*/){ delete static_cast<uint64_t*>(data); } // callback to deallocate after the transfer
                                                       ));
 
         LOG(INFO) << "Sending \"" << counter << "\"";
diff --git a/examples/MQ/8-multipart/FairMQExample8Sampler.cxx b/examples/MQ/8-multipart/FairMQExample8Sampler.cxx
index 45106c20..4eb305e1 100644
--- a/examples/MQ/8-multipart/FairMQExample8Sampler.cxx
+++ b/examples/MQ/8-multipart/FairMQExample8Sampler.cxx
@@ -44,7 +44,7 @@ void FairMQExample8Sampler::Run()
 
         parts.AddPart(NewMessage(header, // data pointer
                                  sizeof(Ex8Header), // data size
-                                 [](void* data, void* hint) { delete static_cast<Ex8Header*>(data); } // callback to deallocate after the transfer
+                                 [](void* data, void* /*hint*/) { delete static_cast<Ex8Header*>(data); } // callback to deallocate after the transfer
                                  ));
         parts.AddPart(NewMessage(1000));