diff --git a/wadsrc/static/zscript/constants.zs b/wadsrc/static/zscript/constants.zs
index 6e9349f36..4cfff28a9 100644
--- a/wadsrc/static/zscript/constants.zs
+++ b/wadsrc/static/zscript/constants.zs
@@ -962,6 +962,7 @@ enum ESkillProperty
 	SKILLP_SlowMonsters,
 	SKILLP_Infight,
 	SKILLP_PlayerRespawn,
+	SKILLP_SpawnMulti,
 };
 enum EFSkillProperty	// floating point properties
 {