diff --git a/wadsrc/static/zscript/constants.txt b/wadsrc/static/zscript/constants.txt
index a74b61d16..c15433cd6 100644
--- a/wadsrc/static/zscript/constants.txt
+++ b/wadsrc/static/zscript/constants.txt
@@ -230,7 +230,7 @@ enum EMorphFlags
 	MRF_UNDOBYTIMEOUT		= 0x00001000,
 	MRF_UNDOALWAYS			= 0x00002000,
 	MRF_TRANSFERTRANSLATION = 0x00004000,
-	MRF_STANDARDUNDOING	= MORPH_UNDOBYTOMEOFPOWER | MORPH_UNDOBYCHAOSDEVICE | MORPH_UNDOBYTIMEOUT,
+	MRF_STANDARDUNDOING	= MRF_UNDOBYTOMEOFPOWER | MRF_UNDOBYCHAOSDEVICE | MRF_UNDOBYTIMEOUT,
 };
 
 // Flags for A_RailAttack and A_CustomRailgun