diff --git a/src/pretix/presale/templates/pretixpresale/event/index.html b/src/pretix/presale/templates/pretixpresale/event/index.html
index bdf15927e1..c37843d0b5 100644
--- a/src/pretix/presale/templates/pretixpresale/event/index.html
+++ b/src/pretix/presale/templates/pretixpresale/event/index.html
@@ -242,13 +242,6 @@
                     </div>
                 {% endif %}
             </form>
-            {% if ev.presale_is_running and display_add_to_cart %}
-                {% trans "You didn't select any ticket." as label_nothing_to_add %}
-                {% trans "Please tick a checkbox or enter a quantity for one of the ticket types to add to the cart." as description_nothing_to_add %}
-                {% dialog "dialog-nothing-to-add" label_nothing_to_add description_nothing_to_add icon="exclamation-circle" %}
-                    <p class="modal-card-confirm"><button class="btn btn-primary">{% trans "OK" %}</button></p>
-                {% enddialog %}
-            {% endif %}
         {% endif %}
     {% endif %}
     </main>
diff --git a/src/pretix/presale/templates/pretixpresale/fragment_modals.html b/src/pretix/presale/templates/pretixpresale/fragment_modals.html
index 8855851709..b62906d3eb 100644
--- a/src/pretix/presale/templates/pretixpresale/fragment_modals.html
+++ b/src/pretix/presale/templates/pretixpresale/fragment_modals.html
@@ -123,3 +123,9 @@
         {% endwith %}
     {% endif %}
 {% endif %}
+
+{% trans "You didn't select any ticket." as label_nothing_to_add %}
+{% trans "Please tick a checkbox or enter a quantity for one of the ticket types to add to the cart." as description_nothing_to_add %}
+{% dialog "dialog-nothing-to-add" label_nothing_to_add description_nothing_to_add icon="exclamation-circle" %}
+    <p class="modal-card-confirm"><button class="btn btn-primary">{% trans "OK" %}</button></p>
+{% enddialog %}
diff --git a/src/pretix/static/pretixpresale/js/ui/main.js b/src/pretix/static/pretixpresale/js/ui/main.js
index ed4ec1c0ed..5290d20f9c 100644
--- a/src/pretix/static/pretixpresale/js/ui/main.js
+++ b/src/pretix/static/pretixpresale/js/ui/main.js
@@ -481,7 +481,7 @@ $(function () {
     $("form:has(#btn-add-to-cart)").on("submit", function(e) {
         if (
             (this.classList.contains("has-seating") && this.querySelector("pretix-seating-checkout-button button")) ||
-            this.querySelector("input[type=checkbox]:checked") || 
+            this.querySelector("input[type=checkbox]:checked, input[type=radio]:checked") ||
             [...this.querySelectorAll(".input-item-count:not([type=hidden])")].some(input => input.value && input.value !== "0") // TODO: seating adds a hidden seating-dummy-item-count, which is not useful and should at some point be removed
         ) {
             // okay, let the submit-event bubble to async-task