diff --git a/zspecial.acs b/zspecial.acs
index dd41f89..1d8a01e 100644
--- a/zspecial.acs
+++ b/zspecial.acs
@@ -263,6 +263,7 @@ special
 	270:Stairs_BuildDownDoom(5),
 	271:Stairs_BuildUpDoomSync(4),
 	272:Stairs_BuildDownDoomSync(4),
+	273:Stairs_BuildUpDoomCrush(5),
 	
 	// new to Eternity
 //	300:Portal_Define(5),