1.1 --- a/src/HOL/Lambda/WeakNorm.thy	Thu Jul 01 16:54:42 2010 +0200
     1.2 +++ b/src/HOL/Lambda/WeakNorm.thy	Thu Jul 01 16:54:44 2010 +0200
     1.3 @@ -349,7 +349,7 @@
     1.4  
     1.5  end
     1.6  
     1.7 -instantiation * :: (default, default) default
     1.8 +instantiation prod :: (default, default) default
     1.9  begin
    1.10  
    1.11  definition "default = (default, default)"