diff --git a/Command-Line-Parameters.md b/Command-Line-Parameters.md
index 6cfa286..6daf3c0 100644
--- a/Command-Line-Parameters.md
+++ b/Command-Line-Parameters.md
@@ -88,6 +88,7 @@ version.
 | -dehout <filename> | Enables verbose dehacked parser logging.  |
 | -dumplumps <wad> | Allow writing predefined lumps out as a WAD.  |
 | -dumptables <wad> | Allow writing generated lumps out as a WAD.  |
+| -force_old_zdoom_nodes | Forces extended (non-GL) ZDoom nodes.  |
 | -noautoload | Disable auto-loading of .wad and .deh files.  |
 | -nocheats | Ignore cheats in dehacked files.  |
 | -nodeh | Avoid loading DEHACKED lumps embedded into WAD files.  |