diff --git a/dist/quagga.js b/dist/quagga.js
index 65aab97..d51693e 100644
--- a/dist/quagga.js
+++ b/dist/quagga.js
@@ -1409,7 +1409,7 @@ define('input_stream',["image_loader"], function(ImageLoader) {
 
         that.setInputStream = function(config) {
             _config = config;
-            video.src = config.src;
+            video.src = (typeof config.src !== 'undefined') ? config.src : '';
         };
 
         that.ended = function() {
diff --git a/src/input_stream.js b/src/input_stream.js
index 3df624a..19d7079 100644
--- a/src/input_stream.js
+++ b/src/input_stream.js
@@ -29,7 +29,7 @@ define(["image_loader"], function(ImageLoader) {
 
         that.setInputStream = function(config) {
             _config = config;
-            video.src = config.src;
+            video.src = (typeof config.src !== 'undefined') ? config.src : '';
         };
 
         that.ended = function() {