diff -r 5b1a737777c9 -r d21c91239737 src/HOL/Tools/ATP/atp_systems.ML
--- a/src/HOL/Tools/ATP/atp_systems.ML	Mon May 14 15:54:26 2012 +0200
+++ b/src/HOL/Tools/ATP/atp_systems.ML	Mon May 14 15:54:26 2012 +0200
@@ -324,7 +324,7 @@
   {exec = (["LEO2_HOME"], "leo"),
    required_vars = [],
    arguments =
-     fn _ => fn _ => fn sos => fn timeout => fn _ =>
+     fn _ => fn _ => fn _ => fn timeout => fn _ =>
         "--proofoutput 1 --timeout " ^ string_of_int (to_secs 1 timeout),
    proof_delims = tstp_proof_delims,
    known_failures =