diff --git a/modules/id5IdSystem.js b/modules/id5IdSystem.js
index 488df984913..c26ba3662e1 100644
--- a/modules/id5IdSystem.js
+++ b/modules/id5IdSystem.js
@@ -263,7 +263,8 @@ class IdFetchFlow {
       'top': referer.reachedTop ? 1 : 0,
       'u': referer.stack[0] || window.location.href,
       'v': '$prebid.version$',
-      'storage': this.submoduleConfig.storage
+      'storage': this.submoduleConfig.storage,
+      'localStorage': storage.localStorageIsEnabled() ? 1 : 0
     };
 
     // pass in optional data, but only if populated
diff --git a/test/spec/modules/id5IdSystem_spec.js b/test/spec/modules/id5IdSystem_spec.js
index 392c11f3529..51954f76356 100644
--- a/test/spec/modules/id5IdSystem_spec.js
+++ b/test/spec/modules/id5IdSystem_spec.js
@@ -65,6 +65,10 @@ describe('ID5 ID System', function () {
     }
   }
 
+  const HEADERS_CONTENT_TYPE_JSON = {
+    'Content-Type': 'application/json'
+  }
+
   function getId5FetchConfig(storageName = ID5_STORAGE_NAME, storageType = 'html5') {
     return {
       name: ID5_MODULE_NAME,
@@ -148,7 +152,7 @@ describe('ID5 ID System', function () {
     }
 
     respondWithConfigAndExpectNext(configRequest, config = ID5_API_CONFIG) {
-      configRequest.respond(200, {'Content-Type': 'application/json'}, JSON.stringify(config));
+      configRequest.respond(200, HEADERS_CONTENT_TYPE_JSON, JSON.stringify(config));
       return this.expectNextRequest()
     }
 
@@ -249,7 +253,7 @@ describe('ID5 ID System', function () {
   });
 
   describe('Xhr Requests from getId()', function () {
-    const responseHeader = {'Content-Type': 'application/json'};
+    const responseHeader = HEADERS_CONTENT_TYPE_JSON
 
     beforeEach(function () {
     });
@@ -719,6 +723,40 @@ describe('ID5 ID System', function () {
     })
   });
 
+  describe('Local storage', () => {
+    let sandbox;
+    beforeEach(() => {
+      sandbox = sinon.sandbox.create();
+      sandbox.stub(storage, 'localStorageIsEnabled');
+    });
+    afterEach(() => {
+      sandbox.restore();
+    });
+    [
+      [true, 1],
+      [false, 0]
+    ].forEach(function ([isEnabled, expectedValue]) {
+      it(`should check localStorage availability and log in request. Available=${isEnabled}`, () => {
+        let xhrServerMock = new XhrServerMock(sinon.createFakeServer())
+        let config = getId5FetchConfig();
+        let submoduleResponse = callSubmoduleGetId(config, undefined, undefined);
+        storage.localStorageIsEnabled.callsFake(() => isEnabled)
+
+        return xhrServerMock.expectFetchRequest()
+          .then(fetchRequest => {
+            let requestBody = JSON.parse(fetchRequest.requestBody);
+            expect(requestBody.localStorage).is.eq(expectedValue);
+
+            fetchRequest.respond(200, HEADERS_CONTENT_TYPE_JSON, JSON.stringify(ID5_JSON_RESPONSE));
+            return submoduleResponse
+          })
+          .then(submoduleResponse => {
+            expect(submoduleResponse).is.deep.equal(ID5_JSON_RESPONSE);
+          });
+      })
+    })
+  });
+
   describe('Request Bids Hook', function () {
     let adUnits;
     let sandbox;
@@ -842,8 +880,7 @@ describe('ID5 ID System', function () {
         expect(requestBody.s).is.eq(ID5_STORED_SIGNATURE);
         expect(requestBody.nbPage).is.eq(2);
         expect(getNbFromCache(ID5_TEST_PARTNER_ID)).is.eq(2);
-        const responseHeader = {'Content-Type': 'application/json'};
-        request.respond(200, responseHeader, JSON.stringify(ID5_JSON_RESPONSE));
+        request.respond(200, HEADERS_CONTENT_TYPE_JSON, JSON.stringify(ID5_JSON_RESPONSE));
 
         return new Promise(function (resolve) {
           (function waitForCondition() {