diff --git a/lib/travis/build/env/builtin.rb b/lib/travis/build/env/builtin.rb
index b52a41dfa5..0beadf8382 100644
--- a/lib/travis/build/env/builtin.rb
+++ b/lib/travis/build/env/builtin.rb
@@ -54,6 +54,7 @@ def env_vars
               TRAVIS_PULL_REQUEST_BRANCH: job[:pull_request_head_branch],
               TRAVIS_PULL_REQUEST_SHA: job[:pull_request_head_sha],
               TRAVIS_PULL_REQUEST_SLUG: job[:pull_request_head_slug],
+              TRAVIS_PULL_REQUEST_TITLE: job[:pull_request_title],
             }
           end
       end
diff --git a/spec/build/env_spec.rb b/spec/build/env_spec.rb
index 9369e22831..eaa07f23cd 100644
--- a/spec/build/env_spec.rb
+++ b/spec/build/env_spec.rb
@@ -23,7 +23,7 @@
 
   it 'includes travis env vars' do
     travis_vars = vars.select { |v| v.key =~ /^TRAVIS_/ }
-    expect(travis_vars.length).to eq(25)
+    expect(travis_vars.length).to eq(26)
   end
 
   describe 'config env vars' do