diff --git a/themes/default/authentication.tpl b/themes/default/authentication.tpl
index 1ef63582e..01c5d4dd3 100644
--- a/themes/default/authentication.tpl
+++ b/themes/default/authentication.tpl
@@ -556,7 +556,7 @@ $(function(){ldelim}
 			<input type="text" class="text" name="phone" id="phone" value="{if isset($smarty.post.phone)}{$smarty.post.phone}{/if}" />
 		</p>
 		<p class="text">
-			<label for="phone_mobile">{l s='Mobile phone'} {if $onr_phone_at_least}<sup>*</sup>{/if}</label>
+			<label for="phone_mobile">{l s='Mobile phone'} {if $one_phone_at_least}<sup>*</sup>{/if}</label>
 			<input type="text" class="text" name="phone_mobile" id="phone_mobile" value="{if isset($smarty.post.phone_mobile)}{$smarty.post.phone_mobile}{/if}" />
 		</p>
 		<p class="required text" id="address_alias">