diff --git a/fairmq/nanomsg/FairMQTransportFactoryNN.h b/fairmq/nanomsg/FairMQTransportFactoryNN.h
index 7710d07c..58957852 100644
--- a/fairmq/nanomsg/FairMQTransportFactoryNN.h
+++ b/fairmq/nanomsg/FairMQTransportFactoryNN.h
@@ -34,7 +34,7 @@ class FairMQTransportFactoryNN : public FairMQTransportFactory
     FairMQMessagePtr CreateMessage(const size_t size) const override;
     FairMQMessagePtr CreateMessage(void* data, const size_t size, fairmq_free_fn* ffn, void* hint = nullptr) const override;
 
-    virtual FairMQSocketPtr CreateSocket(const std::string& type, const std::string& name, const std::string& id = "") const;
+    FairMQSocketPtr CreateSocket(const std::string& type, const std::string& name, const std::string& id = "") const override;
 
     FairMQPollerPtr CreatePoller(const std::vector<FairMQChannel>& channels) const override;
     FairMQPollerPtr CreatePoller(const std::unordered_map<std::string, std::vector<FairMQChannel>>& channelsMap, const std::vector<std::string>& channelList) const override;
diff --git a/fairmq/shmem/FairMQTransportFactorySHM.h b/fairmq/shmem/FairMQTransportFactorySHM.h
index 8b4fcce6..8219ce80 100644
--- a/fairmq/shmem/FairMQTransportFactorySHM.h
+++ b/fairmq/shmem/FairMQTransportFactorySHM.h
@@ -27,7 +27,7 @@ class FairMQTransportFactorySHM : public FairMQTransportFactory
     FairMQMessagePtr CreateMessage(const size_t size) const override;
     FairMQMessagePtr CreateMessage(void* data, const size_t size, fairmq_free_fn* ffn, void* hint = nullptr) const override;
 
-    virtual FairMQSocketPtr CreateSocket(const std::string& type, const std::string& name, const std::string& id = "") const;
+    FairMQSocketPtr CreateSocket(const std::string& type, const std::string& name, const std::string& id = "") const override;
 
     FairMQPollerPtr CreatePoller(const std::vector<FairMQChannel>& channels) const override;
     FairMQPollerPtr CreatePoller(const std::unordered_map<std::string, std::vector<FairMQChannel>>& channelsMap, const std::vector<std::string>& channelList) const override;
diff --git a/fairmq/zeromq/FairMQTransportFactoryZMQ.h b/fairmq/zeromq/FairMQTransportFactoryZMQ.h
index a56179f1..e7088dc8 100644
--- a/fairmq/zeromq/FairMQTransportFactoryZMQ.h
+++ b/fairmq/zeromq/FairMQTransportFactoryZMQ.h
@@ -34,7 +34,7 @@ class FairMQTransportFactoryZMQ : public FairMQTransportFactory
     FairMQMessagePtr CreateMessage(const size_t size) const override;
     FairMQMessagePtr CreateMessage(void* data, const size_t size, fairmq_free_fn* ffn, void* hint = nullptr) const override;
 
-    virtual FairMQSocketPtr CreateSocket(const std::string& type, const std::string& name, const std::string& id = "") const;
+    FairMQSocketPtr CreateSocket(const std::string& type, const std::string& name, const std::string& id = "") const override;
 
     FairMQPollerPtr CreatePoller(const std::vector<FairMQChannel>& channels) const override;
     FairMQPollerPtr CreatePoller(const std::unordered_map<std::string, std::vector<FairMQChannel>>& channelsMap, const std::vector<std::string>& channelList) const override;