diff --git a/login/index_form.html b/login/index_form.html
index 012075adf0e..bfed5054f76 100644
--- a/login/index_form.html
+++ b/login/index_form.html
@@ -30,7 +30,7 @@ if ($show_instructions) {
           <div class="loginform">
             <div class="form-label"><label for="username"><?php print_string("username") ?></label></div>
             <div class="form-input">
-              <input type="text" name="username" id="username" size="15" value="<?php p($frm->username) ?>" />
+              <input type="text" name="username" id="username" size="15" value="<?php p($frm->username, true) ?>" />
             </div>
             <div class="clearer"><!-- --></div>
             <div class="form-label"><label for="password"><?php print_string("password") ?></label></div>