diff --git a/bindings/python/src/alert.cpp b/bindings/python/src/alert.cpp
index 994eb880d..20f7e6998 100644
--- a/bindings/python/src/alert.cpp
+++ b/bindings/python/src/alert.cpp
@@ -575,7 +575,7 @@ void bind_alert()
 
     class_<portmap_error_alert, bases<alert>, noncopyable>(
         "portmap_error_alert", no_init)
-        .def_readonly("mapping", &portmap_error_alert::mapping)
+        .add_property("mapping", make_getter(&portmap_error_alert::mapping, by_value()))
         .def_readonly("error", &portmap_error_alert::error)
         .def_readonly("map_transport", &portmap_error_alert::map_transport)
 #ifndef TORRENT_NO_DEPRECATE
@@ -586,7 +586,7 @@ void bind_alert()
         ;
 
     class_<portmap_alert, bases<alert>, noncopyable>("portmap_alert", no_init)
-        .def_readonly("mapping", &portmap_alert::mapping)
+        .add_property("mapping", make_getter(&portmap_alert::mapping, by_value()))
         .def_readonly("external_port", &portmap_alert::external_port)
         .def_readonly("map_protocol", &portmap_alert::map_protocol)
         .def_readonly("map_transport", &portmap_alert::map_transport)
diff --git a/bindings/python/src/converters.cpp b/bindings/python/src/converters.cpp
index 8945d8345..b4d862756 100644
--- a/bindings/python/src/converters.cpp
+++ b/bindings/python/src/converters.cpp
@@ -19,6 +19,7 @@
 #include "libtorrent/file_storage.hpp" // for file_flags_t
 #include "libtorrent/alert.hpp"
 #include "libtorrent/create_torrent.hpp" // for create_flags_t
+#include "libtorrent/portmap.hpp" // for port_mapping_t
 #include <vector>
 
 using namespace boost::python;
@@ -299,6 +300,7 @@ void bind_converters()
 
     to_python_converter<lt::piece_index_t, from_strong_typedef<lt::piece_index_t>>();
     to_python_converter<lt::file_index_t, from_strong_typedef<lt::file_index_t>>();
+    to_python_converter<lt::port_mapping_t, from_strong_typedef<lt::port_mapping_t>>();
     to_python_converter<lt::torrent_flags_t, from_bitfield_flag<lt::torrent_flags_t>>();
     to_python_converter<lt::peer_flags_t, from_bitfield_flag<lt::peer_flags_t>>();
     to_python_converter<lt::peer_source_flags_t, from_bitfield_flag<lt::peer_source_flags_t>>();
@@ -358,6 +360,7 @@ void bind_converters()
 
     to_strong_typedef<lt::piece_index_t>();
     to_strong_typedef<lt::file_index_t>();
+    to_strong_typedef<lt::port_mapping_t>();
     to_bitfield_flag<lt::torrent_flags_t>();
     to_bitfield_flag<lt::peer_flags_t>();
     to_bitfield_flag<lt::peer_source_flags_t>();