diff --git a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/checkboxlist/checkboxlist.html b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/checkboxlist/checkboxlist.html
index ae691215e7..f49858e5cb 100644
--- a/src/Umbraco.Web.UI.Client/src/views/propertyeditors/checkboxlist/checkboxlist.html
+++ b/src/Umbraco.Web.UI.Client/src/views/propertyeditors/checkboxlist/checkboxlist.html
@@ -5,7 +5,8 @@
             <label class="checkbox">
                 <input type="checkbox" name="checkboxlist"
                        value="{{item.key}}"
-                       ng-model="item.checked" />
+                       ng-model="item.checked"
+                       ng-required="model.validation.mandatory && !model.value.length" />
                 {{item.val}}
             </label>
         </li>