diff --git a/src/gamedata/g_mapinfo.h b/src/gamedata/g_mapinfo.h
index 9f74728542..b697c235da 100644
--- a/src/gamedata/g_mapinfo.h
+++ b/src/gamedata/g_mapinfo.h
@@ -258,8 +258,7 @@ enum ELevelFlags : unsigned int
 	LEVEL3_E4M8SPECIAL			= 0x00004000,
 	LEVEL3_E4M6SPECIAL			= 0x00008000,
 	LEVEL3_NOSHADOWMAP			= 0x00010000,	// disables shadowmaps for a given level.
-	LEVEL3_AVOIDMELEE			= 0x00020000,	// global flag needed for proper MBF support.
-	LEVEL3_NOJUMPDOWN			= 0x00040000,	// only for MBF21. Inverse of MBF's dog_jumping flag.
+	LEVEL3_NOJUMPDOWN			= 0x00020000,	// only for MBF21. Inverse of MBF's dog_jumping flag.
 };
 
 
diff --git a/src/scripting/thingdef_data.cpp b/src/scripting/thingdef_data.cpp
index e3c1f7ed8b..9b20e2d518 100644
--- a/src/scripting/thingdef_data.cpp
+++ b/src/scripting/thingdef_data.cpp
@@ -337,6 +337,7 @@ static FFlagDef ActorFlagDefs[]=
 	DEFINE_FLAG(MF8, MAP07BOSS1, AActor, flags8),
 	DEFINE_FLAG(MF8, MAP07BOSS2, AActor, flags8),
 	DEFINE_FLAG(MF8, AVOIDHAZARDS, AActor, flags8),
+	DEFINE_FLAG(MF8, STAYONLIFT, AActor, flags8),
 
 	// Effect flags
 	DEFINE_FLAG(FX, VISIBILITYPULSE, AActor, effects),