diff --git a/lsteamclient/gen_wrapper.py b/lsteamclient/gen_wrapper.py
index 9f2556d1..b64005e0 100755
--- a/lsteamclient/gen_wrapper.py
+++ b/lsteamclient/gen_wrapper.py
@@ -1658,6 +1658,7 @@ with open('unixlib_generated.cpp', 'w') as file:
     out(u'    }\n')
     out(u'#undef MAKE_CASE\n')
     out(u'\n')
+    out(u'    w_msg->m_hSteamUser = u_msg->m_hSteamUser;\n')
     out(u'    w_msg->m_iCallback = u_msg->m_iCallback;\n')
     out(u'    w_msg->m_cubParam = len;\n')
     out(u'}\n')
diff --git a/lsteamclient/unixlib_generated.cpp b/lsteamclient/unixlib_generated.cpp
index 55f83327..e191be0e 100644
--- a/lsteamclient/unixlib_generated.cpp
+++ b/lsteamclient/unixlib_generated.cpp
@@ -18784,6 +18784,7 @@ void callback_message_utow( const u_CallbackMsg_t *u_msg, w_CallbackMsg_t *w_msg
     }
 #undef MAKE_CASE
 
+    w_msg->m_hSteamUser = u_msg->m_hSteamUser;
     w_msg->m_iCallback = u_msg->m_iCallback;
     w_msg->m_cubParam = len;
 }