1.1 --- a/src/HOL/Library/Countable.thy	Thu Jun 26 10:06:54 2008 +0200
     1.2 +++ b/src/HOL/Library/Countable.thy	Thu Jun 26 10:07:01 2008 +0200
     1.3 @@ -6,7 +6,7 @@
     1.4  header {* Encoding (almost) everything into natural numbers *}
     1.5  
     1.6  theory Countable
     1.7 -imports Finite_Set List Hilbert_Choice
     1.8 +imports Plain List Hilbert_Choice
     1.9  begin
    1.10  
    1.11  subsection {* The class of countable types *}