diff --git a/Release/src/http/listener/http_server_asio.cpp b/Release/src/http/listener/http_server_asio.cpp
index ee026cede1..8b155c23f2 100644
--- a/Release/src/http/listener/http_server_asio.cpp
+++ b/Release/src/http/listener/http_server_asio.cpp
@@ -475,7 +475,11 @@ void hostport_listener::start()
     // resolve the endpoint address
     auto& service = crossplat::threadpool::shared_instance().service();
     tcp::resolver resolver(service);
-    tcp::resolver::query query(m_host, m_port);
+    // #446: boost resolver does not recognize "+" as a host wildchar
+    tcp::resolver::query query = ( "+" == m_host)?
+          tcp::resolver::query(m_port):
+          tcp::resolver::query(m_host, m_port);
+
     tcp::endpoint endpoint = *resolver.resolve(query);
 
     m_acceptor.reset(new tcp::acceptor(service, endpoint));
@@ -1320,4 +1324,4 @@ std::unique_ptr<http_server> make_http_asio_server()
     return make_unique<http_linux_server>();
 }
 
-}}}}
\ No newline at end of file
+}}}}