--- loncom/lonnet/perl/lonnet.pm	2011/09/28 15:31:05	1.1056.4.31
+++ loncom/lonnet/perl/lonnet.pm	2011/10/07 01:19:01	1.1056.4.32
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1056.4.31 2011/09/28 15:31:05 raeburn Exp $
+# $Id: lonnet.pm,v 1.1056.4.32 2011/10/07 01:19:01 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -3714,7 +3714,7 @@ sub hashref2str {
       $result.='=';
       #print("Got a ref of ".(ref($key))." skipping.");
     } else {
-	if ($key) {$result.=&escape($key).'=';} else { last; }
+        if (defined($key)) {$result.=&escape($key).'=';} else { last; }
     }
 
     if(ref($hashref->{$key}) eq 'ARRAY') {