diff -r ca0ac2e75f6d -r 0150cf5982ae ProgTutorial/Recipes/TimeLimit.thy
--- a/ProgTutorial/Recipes/TimeLimit.thy	Thu Mar 19 17:50:28 2009 +0100
+++ b/ProgTutorial/Recipes/TimeLimit.thy	Thu Mar 19 23:21:26 2009 +0100
@@ -8,8 +8,8 @@
   {\bf Problem:}
   Your tool should run only a specified amount of time.\smallskip
 
-  {\bf Solution:} This can be achieved using the function 
-  @{ML timeLimit in TimeLimit}.\smallskip
+  {\bf Solution:} In PolyML 5.2.1 and later, this can be achieved 
+  using the function @{ML timeLimit in TimeLimit}.\smallskip
 
   Assume you defined the Ackermann function on the ML-level.
 *}