diff --git a/CHANGELOG b/CHANGELOG
index 30d4955c9f3a9e53e8e66a66687d1a369f4ec2a6..5ffe91ce4e0b7e4ee5fb803b066fbbc0c3443caa 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -52,6 +52,9 @@ v 8.8.0 (unreleased)
   - Hide left sidebar on phone screens to give more space for content
   - Redesign navigation for profile and group pages
 
+v 8.7.6
+  - Fix links on wiki pages for relative url setups. !4131 (Artem Sidorenko)
+
 v 8.7.5
   - Fix relative links in wiki pages. !4050
   - Fix always showing build notification message when switching between merge requests !4086
diff --git a/app/models/project_wiki.rb b/app/models/project_wiki.rb
index 060ed9b44ecd8db68fa4538ca57b2bd0ae64be21..339fb0b9f9d6d9622704456bbd01b3f75df4e1c8 100644
--- a/app/models/project_wiki.rb
+++ b/app/models/project_wiki.rb
@@ -40,7 +40,7 @@ class ProjectWiki
   end
 
   def wiki_base_path
-    ["/", @project.path_with_namespace, "/wikis"].join('')
+    [Gitlab.config.gitlab.relative_url_root, "/", @project.path_with_namespace, "/wikis"].join('')
   end
 
   # Returns the Gollum::Wiki object.
diff --git a/lib/gitlab/url_builder.rb b/lib/gitlab/url_builder.rb
index 2bbbd3074e86f7fbe3bc9160ea175468391c9f89..fe65c246101e99c4aeac07f576a36f85c6491168 100644
--- a/lib/gitlab/url_builder.rb
+++ b/lib/gitlab/url_builder.rb
@@ -62,7 +62,7 @@ module Gitlab
     end
 
     def wiki_page_url
-      "#{Gitlab.config.gitlab.url}#{object.wiki.wiki_base_path}/#{object.slug}"
+      namespace_project_wiki_url(object.wiki.project.namespace, object.wiki.project, object.slug)
     end
   end
 end
diff --git a/spec/models/project_wiki_spec.rb b/spec/models/project_wiki_spec.rb
index 532e3f013fd0aa692d77e84ba88c37d753c757f6..91ebb612baaf5881a0caf89a9c1776f19de486c5 100644
--- a/spec/models/project_wiki_spec.rb
+++ b/spec/models/project_wiki_spec.rb
@@ -38,7 +38,8 @@ describe ProjectWiki, models: true do
 
   describe "#wiki_base_path" do
     it "returns the wiki base path" do
-      wiki_base_path = "/#{project.path_with_namespace}/wikis"
+      wiki_base_path = "#{Gitlab.config.gitlab.relative_url_root}/#{project.path_with_namespace}/wikis"
+
       expect(subject.wiki_base_path).to eq(wiki_base_path)
     end
   end