diff --git a/modules/RTC/RTCUtils.js b/modules/RTC/RTCUtils.js
index 1ec02712b..08680a6fa 100644
--- a/modules/RTC/RTCUtils.js
+++ b/modules/RTC/RTCUtils.js
@@ -130,7 +130,7 @@ function RTCUtils(RTCService)
     if (navigator.mozGetUserMedia) {
         console.log('This appears to be Firefox');
         var version = parseInt(navigator.userAgent.match(/Firefox\/([0-9]+)\./)[1], 10);
-        if (version >= 39) {
+        if (version >= 38) {
             this.peerconnection = mozRTCPeerConnection;
             this.browser = RTCBrowserType.RTC_BROWSER_FIREFOX;
             this.getUserMedia = navigator.mozGetUserMedia.bind(navigator);