src/ZF/OrderType.thy
changeset 26056 6a0801279f4c
parent 24893 b8ef7afe3a6b
child 32960 69916a850301
--- a/src/ZF/OrderType.thy	Mon Feb 11 15:19:17 2008 +0100
+++ b/src/ZF/OrderType.thy	Mon Feb 11 15:40:21 2008 +0100
@@ -7,7 +7,7 @@
 
 header{*Order Types and Ordinal Arithmetic*}
 
-theory OrderType imports OrderArith OrdQuant Nat begin
+theory OrderType imports OrderArith OrdQuant Nat_ZF begin
 
 text{*The order type of a well-ordering is the least ordinal isomorphic to it.
 Ordinal arithmetic is traditionally defined in terms of order types, as it is