diff --git a/addons/sale/static/src/js/variant_mixin.js b/addons/sale/static/src/js/variant_mixin.js
index 6a2e4aeb9f1..4447be0ada0 100644
--- a/addons/sale/static/src/js/variant_mixin.js
+++ b/addons/sale/static/src/js/variant_mixin.js
@@ -224,12 +224,13 @@ var VariantMixin = {
 
         $container.find(variantsValuesSelectors.join(',')).each(function (){
             var $variantValueInput = $(this);
+            var singleNoCustom = $variantValueInput.data('is_single') && !$variantValueInput.data('is_custom');
 
             if ($variantValueInput.is('select')){
                 $variantValueInput = $variantValueInput.find('option[value=' + $variantValueInput.val() + ']');
             }
 
-            if ($variantValueInput.length !== 0){
+            if ($variantValueInput.length !== 0 && !singleNoCustom){
                 noVariantAttributeValues.push({
                     'custom_product_template_attribute_value_id': $variantValueInput.data('value_id'),
                     'attribute_value_name': $variantValueInput.data('value_name'),
diff --git a/addons/sale/views/variant_templates.xml b/addons/sale/views/variant_templates.xml
index e089e7aff97..08ba630ca68 100644
--- a/addons/sale/views/variant_templates.xml
+++ b/addons/sale/views/variant_templates.xml
@@ -10,7 +10,8 @@
                     t-attf-class="variant_attribute #{'d-none' if len(ptal.product_template_value_ids._only_active()) == 1 and not ptal.product_template_value_ids._only_active()[0].is_custom else ''}">
 
                     <!-- Used to customize layout if the only available attribute value is custom -->
-                    <t t-set="single_and_custom" t-value="len(ptal.product_template_value_ids._only_active()) == 1 and ptal.product_template_value_ids._only_active()[0].is_custom" />
+                    <t t-set="single" t-value="len(ptal.product_template_value_ids._only_active()) == 1"/>
+                    <t t-set="single_and_custom" t-value="single and ptal.product_template_value_ids._only_active()[0].is_custom" />
                     <strong t-field="ptal.attribute_id.name" class="attribute_name"/>
 
                     <t t-if="ptal.attribute_id.display_type == 'select'">
@@ -25,6 +26,7 @@
                                     t-att-data-attribute_name="ptav.attribute_id.name"
                                     t-att-data-is_custom="ptav.is_custom"
                                     t-att-selected="ptav in combination"
+                                    t-att-data-is_single="single"
                                     t-att-data-is_single_and_custom="single_and_custom">
                                     <span t-field="ptav.name"/>
                                     <span t-if="ptav.price_extra" class="badge badge-pill badge-secondary">
@@ -65,6 +67,7 @@
                                                 t-att-data-value_name="ptav.name"
                                                 t-att-data-attribute_name="ptav.attribute_id.name"
                                                 t-att-data-is_custom="ptav.is_custom"
+                                                t-att-data-is_single="single"
                                                 t-att-data-is_single_and_custom="single_and_custom" />
                                             <div class="radio_input_value custom-control-label">
                                                 <span t-field="ptav.name"/>
@@ -119,6 +122,7 @@
                                         t-att-data-value_name="ptav.name"
                                         t-att-data-attribute_name="ptav.attribute_id.name"
                                         t-att-data-is_custom="ptav.is_custom"
+                                        t-att-data-is_single="single"
                                         t-att-data-is_single_and_custom="single_and_custom"/>
                                 </label>
                             </li>