diff --git a/code/fgame/bg_public.h b/code/fgame/bg_public.h
index 50cb77a8..8859638e 100644
--- a/code/fgame/bg_public.h
+++ b/code/fgame/bg_public.h
@@ -696,6 +696,7 @@ movement on the server game.
 #define MASK_BATTLELANGUAGE                                                                        \
     (CONTENTS_SOLID | CONTENTS_BBOX | CONTENTS_NOBOTCLIP | CONTENTS_UNKNOWN2 | CONTENTS_PLAYERCLIP \
      | CONTENTS_WEAPONCLIP | CONTENTS_BODY | CONTENTS_TRIGGER)
+#define MASK_SCRIPT_SLAVE (CONTENTS_LADDER|CONTENTS_CLAYPIDGEON|CONTENTS_BBOX|CONTENTS_NOBOTCLIP|CONTENTS_UNKNOWN2|CONTENTS_UNKNOWN3|CONTENTS_BODY|CONTENTS_CORPSE)
 
     // mohaa mask
     /*