diff --git a/src/socket_base.cpp b/src/socket_base.cpp
index b8796571..e82c193d 100644
--- a/src/socket_base.cpp
+++ b/src/socket_base.cpp
@@ -837,10 +837,6 @@ void zmq::socket_base_t::process_bind (pipe_t *pipe_)
     attach_pipe (pipe_);
 }
 
-void zmq::socket_base_t::process_unplug ()
-{
-}
-
 void zmq::socket_base_t::process_term (int linger_)
 {
     //  Unregister all inproc endpoints associated with this socket.
diff --git a/src/socket_base.hpp b/src/socket_base.hpp
index 1788cd49..1abee52f 100644
--- a/src/socket_base.hpp
+++ b/src/socket_base.hpp
@@ -180,7 +180,6 @@ namespace zmq
         //  Handlers for incoming commands.
         void process_stop ();
         void process_bind (zmq::pipe_t *pipe_);
-        void process_unplug ();
         void process_term (int linger_);
 
         //  Socket's mailbox object.