diff --git a/src/webrtc-media-provider.js b/src/webrtc-media-provider.js
index ce765c93..33a24c91 100644
--- a/src/webrtc-media-provider.js
+++ b/src/webrtc-media-provider.js
@@ -543,7 +543,7 @@ function removeVideoElement(video) {
  */
 var available = function () {
     //return (adapter.browserDetails.browser != "edge") ? navigator.getUserMedia && RTCPeerConnection : false;
-    return navigator.getUserMedia && RTCPeerConnection;
+    return ('getUserMedia' in navigator && 'RTCPeerConnection' in window);
 };
 
 var listDevices = function (labels) {
@@ -695,4 +695,4 @@ module.exports = {
         logger = configuration.logger;
         logger.info(LOG_PREFIX, "Initialized");
     }
-};
\ No newline at end of file
+};