diff --git a/src/pretix/presale/views/widget.py b/src/pretix/presale/views/widget.py
index 6588d7807..c0b6cbc44 100644
--- a/src/pretix/presale/views/widget.py
+++ b/src/pretix/presale/views/widget.py
@@ -272,6 +272,7 @@ class WidgetAPIProductList(EventListMixin, View):
                         'min_price': item.min_price if item.has_variations else None,
                         'max_price': item.max_price if item.has_variations else None,
                         'allow_waitinglist': item.allow_waitinglist,
+                        'mandatory_priced_addons': item.mandatory_priced_addons,
                         'free_price': item.free_price,
                         'avail': [
                             item.cached_availability[0],
diff --git a/src/pretix/static/pretixpresale/js/widget/widget.js b/src/pretix/static/pretixpresale/js/widget/widget.js
index 247f09c0c..7c3d1fc2e 100644
--- a/src/pretix/static/pretixpresale/js/widget/widget.js
+++ b/src/pretix/static/pretixpresale/js/widget/widget.js
@@ -307,7 +307,8 @@ Vue.component('pricebox', {
         price: Object,
         free_price: Boolean,
         field_name: String,
-        original_price: String
+        original_price: String,
+        mandatory_priced_addons: Boolean,
     },
     computed: {
         display_price: function () {
@@ -329,6 +330,9 @@ Vue.component('pricebox', {
         },
         priceline: function () {
             if (this.price.gross === "0.00") {
+                if (this.mandatory_priced_addons) {
+                    return "\xA0"; // nbsp, because an empty string would cause the HTML element to collapse
+                }
                 return strings.free;
             } else {
                 return this.$root.currency + " " + this.display_price;
@@ -375,7 +379,8 @@ Vue.component('variation', {
 
         // Price
         + '<div class="pretix-widget-item-price-col">'
-        + '<pricebox :price="variation.price" :free_price="item.free_price" :original_price="orig_price"'
+        + '<pricebox :price="variation.price" :free_price="item.free_price" :original_price="orig_price" '
+        + '          :mandatory_priced_addons="item.mandatory_priced_addons"'
         + '          :field_name="\'price_\' + item.id + \'_\' + variation.id" v-if="$root.showPrices">'
         + '</pricebox>'
         + '<span v-if="!$root.showPrices">&nbsp;</span>'
@@ -432,6 +437,7 @@ Vue.component('item', {
         // Price
         + '<div class="pretix-widget-item-price-col">'
         + '<pricebox :price="item.price" :free_price="item.free_price" v-if="!item.has_variations && $root.showPrices"'
+        + '          :mandatory_priced_addons="item.mandatory_priced_addons"'
         + '          :field_name="\'price_\' + item.id" :original_price="item.original_price">'
         + '</pricebox>'
         + '<div class="pretix-widget-pricebox" v-if="item.has_variations && $root.showPrices">{{ pricerange }}</div>'
@@ -500,6 +506,9 @@ Vue.component('item', {
                 return this.$root.currency + " " + floatformat(this.item.min_price, 2) + " – "
                     + floatformat(this.item.max_price, 2);
             } else if (this.item.min_price === "0.00" && this.item.max_price === "0.00") {
+                if (this.item.mandatory_priced_addons) {
+                    return "\xA0"; // nbsp, because an empty string would cause the HTML element to collapse
+                }
                 return strings.free;
             } else {
                 return this.$root.currency + " " + floatformat(this.item.min_price, 2);
diff --git a/src/tests/presale/test_widget.py b/src/tests/presale/test_widget.py
index 691934b59..9d57e41aa 100644
--- a/src/tests/presale/test_widget.py
+++ b/src/tests/presale/test_widget.py
@@ -185,6 +185,7 @@ class WidgetCartTest(CartTestMixin, TestCase):
                             "picture": None,
                             "has_variations": 0,
                             "allow_waitinglist": True,
+                            "mandatory_priced_addons": False,
                             "description": None,
                             "min_price": None,
                             "avail": [100, None],
@@ -203,6 +204,7 @@ class WidgetCartTest(CartTestMixin, TestCase):
                             "picture": None,
                             "has_variations": 4,
                             "allow_waitinglist": True,
+                            "mandatory_priced_addons": False,
                             "description": None,
                             "min_price": "12.00",
                             "avail": None,
@@ -263,6 +265,7 @@ class WidgetCartTest(CartTestMixin, TestCase):
                         "picture": None,
                         "has_variations": 0,
                         "allow_waitinglist": True,
+                        "mandatory_priced_addons": False,
                         "description": None,
                         "min_price": None,
                         "avail": [100, None],
@@ -307,6 +310,7 @@ class WidgetCartTest(CartTestMixin, TestCase):
                         "picture": None,
                         "has_variations": 4,
                         "allow_waitinglist": True,
+                        "mandatory_priced_addons": False,
                         "description": None,
                         "min_price": "12.00",
                         "avail": None,
@@ -365,6 +369,7 @@ class WidgetCartTest(CartTestMixin, TestCase):
                             "picture": None,
                             "has_variations": 0,
                             "allow_waitinglist": True,
+                            "mandatory_priced_addons": False,
                             "description": None,
                             "min_price": None,
                             "avail": [100, None],
@@ -417,6 +422,7 @@ class WidgetCartTest(CartTestMixin, TestCase):
                             'description': None,
                             'has_variations': 2,
                             "allow_waitinglist": True,
+                            "mandatory_priced_addons": False,
                             'require_voucher': False,
                             'order_min': None,
                             'order_max': None,