diff --git a/assets/javascripts/discourse/models/custom-wizard-admin.js.es6 b/assets/javascripts/discourse/models/custom-wizard-admin.js.es6
index 03afd32e..746ca00c 100644
--- a/assets/javascripts/discourse/models/custom-wizard-admin.js.es6
+++ b/assets/javascripts/discourse/models/custom-wizard-admin.js.es6
@@ -10,9 +10,9 @@ import discourseComputed from "discourse-common/utils/decorators";
 const GUEST_GROUP_ID = -1;
 
 const CustomWizardAdmin = EmberObject.extend({
-  @discourseComputed("permitted.@each")
+  @discourseComputed("permitted.@each.output")
   allowGuests(permitted) {
-    return permitted.filter((p) => p.output === GUEST_GROUP_ID).length;
+    return permitted.filter((p) => p.output.includes(GUEST_GROUP_ID)).length;
   },
 
   save(opts) {
diff --git a/lib/custom_wizard/validators/template.rb b/lib/custom_wizard/validators/template.rb
index 38b2595c..154f525e 100644
--- a/lib/custom_wizard/validators/template.rb
+++ b/lib/custom_wizard/validators/template.rb
@@ -83,7 +83,7 @@ class CustomWizard::TemplateValidator
 
   def validate_action(action)
     guests_permitted = @data[:permitted] && @data[:permitted].any? do |m|
-      m[:output] === CustomWizard::Wizard::GUEST_GROUP_ID
+      m["output"].include?(CustomWizard::Wizard::GUEST_GROUP_ID)
     end
 
     if guests_permitted && CustomWizard::Action::REQUIRES_USER.include?(action[:type])
diff --git a/spec/components/custom_wizard/template_validator_spec.rb b/spec/components/custom_wizard/template_validator_spec.rb
index b149706f..54ec9cfa 100644
--- a/spec/components/custom_wizard/template_validator_spec.rb
+++ b/spec/components/custom_wizard/template_validator_spec.rb
@@ -7,6 +7,7 @@ describe CustomWizard::TemplateValidator do
   let(:user_condition) { get_wizard_fixture("condition/user_condition") }
   let(:permitted_json) { get_wizard_fixture("wizard/permitted") }
   let(:composer_preview) { get_wizard_fixture("field/composer_preview") }
+  let(:guests_permitted) { get_wizard_fixture("wizard/guests_permitted") }
 
   let(:valid_liquid_template) {
     <<-LIQUID.strip
@@ -146,6 +147,15 @@ describe CustomWizard::TemplateValidator do
       ).to eq(true)
     end
 
+    it "validates restrictions on wizards that permit guests" do
+      template[:permitted] = guests_permitted['permitted']
+      validator = CustomWizard::TemplateValidator.new(template)
+      expect(validator.perform).to eq(false)
+      expect(validator.errors.first.type).to eq(
+        I18n.t("wizard.validation.not_permitted_for_guests", object_id: "action_1")
+      )
+    end
+
     it "validates step attributes" do
       template[:steps][0][:condition] = user_condition['condition']
       expect(