diff --git a/src/lua_mobjlib.c b/src/lua_mobjlib.c
index 6b08d1cdd..c1ad48ab2 100644
--- a/src/lua_mobjlib.c
+++ b/src/lua_mobjlib.c
@@ -862,7 +862,7 @@ static int mobj_set(lua_State *L)
 			// Mhm. Yeah.
 			visflags = eflags_vischeck(eflags);
 
-			if (visflags)
+			if ((visflags) && ((mo->renderflags & RF_DONTDRAW) != RF_DONTDRAW))
 			{
 				mo->renderflags &= ~RF_DONTDRAW;
 				mo->renderflags |= visflags;