diff -r 979a0b37f981 -r 9cde57cdd0e3 src/HOL/Tools/Sledgehammer/clausifier.ML
--- a/src/HOL/Tools/Sledgehammer/clausifier.ML	Sun Aug 22 09:43:10 2010 +0200
+++ b/src/HOL/Tools/Sledgehammer/clausifier.ML	Sun Aug 22 14:27:30 2010 +0200
@@ -8,6 +8,7 @@
 signature CLAUSIFIER =
 sig
   val transform_elim_theorem : thm -> thm
+  val extensionalize_theorem : thm -> thm
   val introduce_combinators_in_cterm : cterm -> thm
   val introduce_combinators_in_theorem : thm -> thm
   val cnf_axiom: theory -> thm -> thm list