diff --git a/src/ipc_listener.cpp b/src/ipc_listener.cpp
index 8a9d2aea..8600abcc 100644
--- a/src/ipc_listener.cpp
+++ b/src/ipc_listener.cpp
@@ -144,6 +144,7 @@ int zmq::ipc_listener_t::set_address (const char *addr_)
     if (rc != 0)
         return -1;
 
+    filename.assign(addr_);
     has_file = true;
 
     //  Listen for incomming connections.