diff --git a/wadsrc/static/zscript/constants.zs b/wadsrc/static/zscript/constants.zs
index 725044afe..8b65a47dd 100644
--- a/wadsrc/static/zscript/constants.zs
+++ b/wadsrc/static/zscript/constants.zs
@@ -1270,6 +1270,8 @@ enum SPAC
 	SPAC_MUse = 1<<8,		// monsters can use
 	SPAC_MPush = 1<<9,		// monsters can push
 	SPAC_UseBack = 1<<10,	// Can be used from the backside
+	SPAC_Damage = 1<<11,	// [ZZ] when linedef receives damage
+	SPAC_Death = 1<<12,		// [ZZ] when linedef receives damage and has 0 health
 
 	SPAC_PlayerActivate = (SPAC_Cross|SPAC_Use|SPAC_Impact|SPAC_Push|SPAC_AnyCross|SPAC_UseThrough|SPAC_UseBack),
 };