src/ZF/Induct/ListN.thy
changeset 65449 c82e63b11b8b
parent 61798 27f3c10b0b50
child 76213 e44d86131648
--- a/src/ZF/Induct/ListN.thy	Sun Apr 09 20:17:00 2017 +0200
+++ b/src/ZF/Induct/ListN.thy	Sun Apr 09 20:44:35 2017 +0200
@@ -5,7 +5,7 @@
 
 section \<open>Lists of n elements\<close>
 
-theory ListN imports Main begin
+theory ListN imports ZF begin
 
 text \<open>
   Inductive definition of lists of \<open>n\<close> elements; see