diff --git a/docs/changelog/6.x.x.txt b/docs/changelog/6.x.x.txt
index fff8ff23b..228128f04 100644
--- a/docs/changelog/6.x.x.txt
+++ b/docs/changelog/6.x.x.txt
@@ -26,6 +26,7 @@
  - Fixed a bunch of Collaboration System template problems.
  - fix [ 1165829 ] i18n/english/Eventscalendar.pm: double entrys [mwilson]
  - fix [ 1165386 ] Templates page overlap [mwilson]
+ - fix [ 1166071 ] Create New User allows blank username [mwilson]
 
 
 6.5.2
diff --git a/lib/WebGUI/Operation/User.pm b/lib/WebGUI/Operation/User.pm
index bb71a86bb..17260d05f 100644
--- a/lib/WebGUI/Operation/User.pm
+++ b/lib/WebGUI/Operation/User.pm
@@ -357,7 +357,7 @@ sub www_editUserSave {
 	return WebGUI::Privilege::adminOnly() unless ($isAdmin || $isSecondary);
 	my ($uid) = WebGUI::SQL->quickArray("select userId from users where username=".quote($session{form}{username}));
 	my $error;
-	if ($uid eq $session{form}{uid} || $uid eq "") {
+	if ($uid eq $session{form}{uid} || $uid eq "" || $session{form}{username} ne "") {
 	   	my $u = WebGUI::User->new($session{form}{uid});
 		$session{form}{uid} = $u->userId unless ($isSecondary);
 	   	$u->username($session{form}{username});