diff --git a/src/kaltura-player.js b/src/kaltura-player.js
index 3b27926bc..6dd72b9eb 100644
--- a/src/kaltura-player.js
+++ b/src/kaltura-player.js
@@ -75,7 +75,7 @@ class KalturaPlayer extends FakeEventTarget {
     Object.values(CoreEventType).forEach(coreEvent => this._eventManager.listen(this._localPlayer, coreEvent, e => this.dispatchEvent(e)));
     this._addBindings();
     this._playlistManager.configure(options.playlist);
-    this._localPlayer.configure({sources});
+    this._localPlayer.configure({sources: sources || {}});
   }
 
   /**
diff --git a/test/src/kaltura-player.spec.js b/test/src/kaltura-player.spec.js
index c4c74b4f0..cc8f7a951 100644
--- a/test/src/kaltura-player.spec.js
+++ b/test/src/kaltura-player.spec.js
@@ -41,6 +41,18 @@ describe('kaltura player api', function () {
     TestUtils.removeElement(targetId);
   });
 
+  describe('constructor', function () {
+    beforeEach(function () {
+      kalturaPlayer = setup(config);
+    });
+
+    afterEach(function () {
+      kalturaPlayer.destroy();
+    });
+    it('config.sources should be an empty object if no configured', function () {
+      kalturaPlayer.config.sources.should.be.exist;
+    });
+  });
   describe('media api', function () {
     describe('loadMedia', function () {
       const entryId = '0_wifqaipd';
@@ -614,6 +626,7 @@ describe('kaltura player api', function () {
       });
     });
   });
+
   describe('async plugins loading', () => {
     let player;
     beforeEach(() => {