diff --git a/webtools/bugzilla/template/en/default/admin/users/userdata.html.tmpl b/webtools/bugzilla/template/en/default/admin/users/userdata.html.tmpl
index cb3da3b1368..feee4c5d6a9 100644
--- a/webtools/bugzilla/template/en/default/admin/users/userdata.html.tmpl
+++ b/webtools/bugzilla/template/en/default/admin/users/userdata.html.tmpl
@@ -30,7 +30,7 @@
         [% IF !otheruser.groups.bz_sudo_protect %]
           <br />
           <a href="relogin.cgi?action=prepare-sudo&amp;target_login=
-          [%- otheruser.login FILTER html %]">Impersonate this user</a>
+          [%- otheruser.login FILTER url_quote %]">Impersonate this user</a>
         [% END %]
       [% END %]
     [% ELSE %]