--- loncom/homework/default_homework.lcpm	2011/10/06 17:15:40	1.161
+++ loncom/homework/default_homework.lcpm	2012/11/21 23:22:43	1.162
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # used by lonxml::xmlparse() as input variable $safeinit to Apache::run::run()
 #
-# $Id: default_homework.lcpm,v 1.161 2011/10/06 17:15:40 raeburn Exp $
+# $Id: default_homework.lcpm,v 1.162 2012/11/21 23:22:43 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -816,6 +816,7 @@ sub cos { CORE::cos(shift) }
 sub exp { CORE::exp(shift) }
 sub int { CORE::int(shift) }
 sub log { CORE::log(shift) }
+sub ln { CORE::log(shift) }
 sub atan2 { CORE::atan2($_[0],$_[1]) }
 sub sqrt { CORE::sqrt(shift) }