diff --git a/bigbluebutton-html5/app/client/lib/bbb_verto_resources_use/Screen-Capturing.js b/bigbluebutton-html5/app/client/lib/bbb_verto_resources_use/Screen-Capturing.js
index fa9ef54f49..ab3e08d207 100755
--- a/bigbluebutton-html5/app/client/lib/bbb_verto_resources_use/Screen-Capturing.js
+++ b/bigbluebutton-html5/app/client/lib/bbb_verto_resources_use/Screen-Capturing.js
@@ -135,7 +135,9 @@ this.getScreenConstraints = function(callback) {
     // this statement verifies chrome extension availability
     // if installed and available then it will invoke extension API
     // otherwise it will fallback to command-line based screen capturing API
-    if (chromeMediaSource == 'desktop' && !sourceId) {
+    // without a previous sourceId, Chrome will prompt the user to choose again
+    sourceId = null;
+    if (chromeMediaSource == 'desktop') {
         getSourceId(function() {
             screen_constraints.mandatory.chromeMediaSourceId = sourceId;
             callback(sourceId == 'PermissionDeniedError' ? sourceId : null, screen_constraints);
diff --git a/bigbluebutton-html5/app/client/lib/bbb_verto_resources_use/verto_extension_share.js b/bigbluebutton-html5/app/client/lib/bbb_verto_resources_use/verto_extension_share.js
index f273cb94a3..2dcdd52021 100755
--- a/bigbluebutton-html5/app/client/lib/bbb_verto_resources_use/verto_extension_share.js
+++ b/bigbluebutton-html5/app/client/lib/bbb_verto_resources_use/verto_extension_share.js
@@ -60,7 +60,6 @@ this.doshare = function(on, callback, videoTag) {
 		});
 	} else {
 		getChromeExtensionStatus( function(status) {
-			sourceId = null;
 			getScreenConstraints(function(error, screen_constraints) {
 				if(error) {
 					return console.error(error);