diff --git a/nx-X11/programs/Xserver/hw/nxagent/Args.c b/nx-X11/programs/Xserver/hw/nxagent/Args.c
index 9ecf2fb8a7..3f98810049 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Args.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Args.c
@@ -2104,6 +2104,9 @@ void ddxUseMsg(void)
   ErrorF("-autodpi               detect real server's DPI and use that in the session\n");
   ErrorF("-display string        display name of the real server\n");
   ErrorF("-sync                  synchronize with the real server\n");
+  ErrorF("-nxrealwindowprop      set property NX_REAL_WINDOW for each X11 window inside nxagent\n");
+  ErrorF("-reportwids            report externally exposed X11 window IDs to the session log\n");
+  ErrorF("-reportprivatewids     report internal X11 window ID to the session log\n");
 #ifdef RENDER
   ErrorF("-norender              disable the use of the render extension\n");
   ErrorF("-nocomposite           disable the use of the composite extension\n");