diff --git a/addons/auth_signup/views/auth_signup_login_templates.xml b/addons/auth_signup/views/auth_signup_login_templates.xml
index 2461804f4e1..19273d6760b 100644
--- a/addons/auth_signup/views/auth_signup_login_templates.xml
+++ b/addons/auth_signup/views/auth_signup_login_templates.xml
@@ -91,8 +91,8 @@
                     <input type="hidden" name="redirect" t-att-value="redirect"/>
                     <input type="hidden" name="token" t-att-value="token"/>
                     <div class="clearfix oe_login_buttons">
-                        <div class="d-flex justify-content-between align-items-center small">
-                            <button type="submit" class="btn btn-primary btn-sm">Confirm</button>
+                        <button type="submit" class="btn btn-primary btn-block">Confirm</button>
+                        <div class="d-flex justify-content-between align-items-center small mt-2">
                             <a t-if="not token" t-attf-href="/web/login?{{ keep_query() }}">Back to Login</a>
                             <a t-if="invalid_token" href="/web/login">Back to Login</a>
                         </div>