diff --git a/src/thingdef/thingdef_data.cpp b/src/thingdef/thingdef_data.cpp
index 8af93f0bd..87ac4f198 100644
--- a/src/thingdef/thingdef_data.cpp
+++ b/src/thingdef/thingdef_data.cpp
@@ -310,6 +310,7 @@ static FFlagDef WeaponFlags[] =
 	DEFINE_FLAG(WIF, NOAUTOAIM, AWeapon, WeaponFlags),
 	
 	DEFINE_DUMMY_FLAG(NOLMS),
+	DEFINE_DUMMY_FLAG(ALLOW_WITH_RESPAWN_INVUL),
 };
 
 static FFlagDef PlayerPawnFlags[] =
@@ -613,3 +614,4 @@ void InitThingdef()
 		qsort(&variables[0], variables.Size(), sizeof(variables[0]), varcmp);
 	}
 }
+
diff --git a/src/thingdef/thingdef_properties.cpp b/src/thingdef/thingdef_properties.cpp
index cd2537db0..884e596e2 100644
--- a/src/thingdef/thingdef_properties.cpp
+++ b/src/thingdef/thingdef_properties.cpp
@@ -1570,6 +1570,15 @@ DEFINE_CLASS_PROPERTY(slotpriority, F, Weapon)
 	info->Class->Meta.SetMetaFixed(AWMETA_SlotPriority, i);
 }
 
+//==========================================================================
+//
+//==========================================================================
+DEFINE_CLASS_PROPERTY(preferredskin, S, Weapon)
+{
+	PROP_STRING_PARM(str, 0);
+	// NoOp - only for Skulltag compatibility
+}
+
 //==========================================================================
 //
 //==========================================================================