--- loncom/interface/loncommon.pm	2002/03/28 21:38:53	1.29
+++ loncom/interface/loncommon.pm	2002/03/28 22:15:56	1.30
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.29 2002/03/28 21:38:53 www Exp $
+# $Id: loncommon.pm,v 1.30 2002/03/28 22:15:56 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -367,7 +367,7 @@ sub get_unprocessed_cgi {
       $value =~ tr/+/ /;
       $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
       &Apache::lonxml::debug("Seting :$name: to :$value:");
-      unless ($ENV{'form.'.$name}) { &add_to_env('form.'.$name,$value) };
+      unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
     }
   }
 }