diff --git a/lib/convertLcovToCoveralls.js b/lib/convertLcovToCoveralls.js
index 4323034c..65ec381a 100644
--- a/lib/convertLcovToCoveralls.js
+++ b/lib/convertLcovToCoveralls.js
@@ -99,6 +99,9 @@ const convertLcovToCoveralls = (input, options, cb) => {
     if (options.parallel) {
       postJson.parallel = options.parallel;
     }
+    if (options.flag_name) {
+      postJson.flag_name = options.flag_name;
+    }
     parsed.forEach(file => {
       file.file = cleanFilePath(file.file);
       const currentFilePath = path.resolve(filepath, file.file);
diff --git a/test/convertLcovToCoveralls.js b/test/convertLcovToCoveralls.js
index 6cb24e80..4ce10d29 100644
--- a/test/convertLcovToCoveralls.js
+++ b/test/convertLcovToCoveralls.js
@@ -34,6 +34,7 @@ describe('convertLcovToCoveralls', () => {
     process.env.COVERALLS_REPO_TOKEN = 'REPO_TOKEN';
     process.env.CI_PULL_REQUEST = 'https://github.com/fake/fake/pulls/123';
     process.env.COVERALLS_PARALLEL = 'true';
+    process.env.COVERALLS_FLAG_NAME = 'FLAG_NAME';
 
     getOptions((err, options) => {
       const lcovpath = path.join(__dirname, '/../fixtures/onefile.lcov');
@@ -49,6 +50,7 @@ describe('convertLcovToCoveralls', () => {
         output.service_job_id.should.equal('SERVICE_JOB_ID');
         output.service_pull_request.should.equal('123');
         output.parallel.should.equal(true);
+        output.flag_name.should.equal('FLAG_NAME');
         //output.git.should.equal("GIT_HASH");
         done();
       });