diff --git a/group_chooser.cgi b/group_chooser.cgi
index 28c9a097d..ba9d30d47 100755
--- a/group_chooser.cgi
+++ b/group_chooser.cgi
@@ -191,7 +191,9 @@ if ($access{'gedit_mode'} == 2 || $access{'gedit_mode'} == 3) {
 	map { $gcan{$_}++ } split(/\s+/, $access{'gedit'});
 	}
 setgrent();
+local %doneg;
 while(@ginfo = getgrent()) {
+	next if ($doneg{$ginfo[0]}++);
 	@mems = &unique( split(/ /, $ginfo[3]), @{$members{$ginfo[2]}} );
 	if (@mems > 3) { @mems = (@mems[0..1], "..."); }
 	$ginfo[3] = join(' ', @mems);
diff --git a/user_chooser.cgi b/user_chooser.cgi
index bd3c5d354..78fdada46 100755
--- a/user_chooser.cgi
+++ b/user_chooser.cgi
@@ -182,7 +182,9 @@ if ($access{'uedit_mode'} == 2 || $access{'uedit_mode'} == 3) {
 	map { $ucan{$_}++ } split(/\s+/, $access{'uedit'});
 	}
 setpwent();
+local %doneu;
 while(@uinfo = getpwent()) {
+	next if ($doneu{$uinfo[0]}++);
 	if ($access{'uedit_mode'} == 5 && $access{'uedit'} !~ /^\d+$/) {
 		# Get group for matching by group name
 		@ginfo = getgrgid($uinfo[3]);