diff --git a/wadsrc/static/zscript/base.txt b/wadsrc/static/zscript/base.txt
index 2ba475639..be73e3f4d 100644
--- a/wadsrc/static/zscript/base.txt
+++ b/wadsrc/static/zscript/base.txt
@@ -15,7 +15,7 @@ struct _ native	// These are the global variables, the struct is only here to av
 	native readonly ui bool netgame;
 
 	native readonly bool automapactive;
-	native play uint gameaction;
+	native readonly uint gameaction;
 	native readonly int gamestate;
 	native readonly TextureID skyflatnum;
 	native readonly Font smallfont;