diff --git a/app/services/wiki_pages/base_service.rb b/app/services/wiki_pages/base_service.rb
index 9ab9d18741..9162f12860 100644
--- a/app/services/wiki_pages/base_service.rb
+++ b/app/services/wiki_pages/base_service.rb
@@ -11,7 +11,7 @@ module WikiPages
         repository: @project.hook_attrs.slice(:name, :url, :description, :homepage)
       }
 
-      page_url = Gitlab::UrlBuilder.new(:wiki_page).build(page)
+      page_url = Gitlab::UrlBuilder.build(page)
       hook_data[:object_attributes].merge!(url: page_url, action: action)
       hook_data
     end
diff --git a/spec/factories/project_wikis.rb b/spec/factories/project_wikis.rb
new file mode 100644
index 0000000000..a3403fd76a
--- /dev/null
+++ b/spec/factories/project_wikis.rb
@@ -0,0 +1,7 @@
+FactoryGirl.define do
+  factory :project_wiki do
+    project factory: :empty_project
+    user factory: :user
+    initialize_with { new(project, user) }
+  end
+end
diff --git a/spec/factories/wiki_pages.rb b/spec/factories/wiki_pages.rb
new file mode 100644
index 0000000000..938ccf2306
--- /dev/null
+++ b/spec/factories/wiki_pages.rb
@@ -0,0 +1,9 @@
+require 'ostruct'
+
+FactoryGirl.define do
+  factory :wiki_page do
+    page = OpenStruct.new(url_path: 'some-name')
+    association :wiki, factory: :project_wiki, strategy: :build
+    initialize_with { new(wiki, page, true) }
+  end
+end
diff --git a/spec/lib/gitlab/url_builder_spec.rb b/spec/lib/gitlab/url_builder_spec.rb
index 6ffc0d6e65..bf11472407 100644
--- a/spec/lib/gitlab/url_builder_spec.rb
+++ b/spec/lib/gitlab/url_builder_spec.rb
@@ -106,5 +106,14 @@ describe Gitlab::UrlBuilder, lib: true do
         end
       end
     end
+
+    context 'when passing a WikiPage' do
+      it 'returns a proper URL' do
+        wiki_page = build(:wiki_page)
+        url = described_class.build(wiki_page)
+
+        expect(url).to eq "#{Gitlab.config.gitlab.url}#{wiki_page.wiki.wiki_base_path}/#{wiki_page.slug}"
+      end
+    end
   end
 end