diff --git a/lib/webrtc/call.js b/lib/webrtc/call.js
index dc2aeedd8..762c7f363 100644
--- a/lib/webrtc/call.js
+++ b/lib/webrtc/call.js
@@ -279,7 +279,7 @@ MatrixCall.prototype.setLocalVideoMuted = function(muted) {
  * @return {Boolean} True if the local preview video is muted, else false
  * (including if the call is not set up yet).
  */
-MatrixCall.prototype.isLocalVideoMuted = function(muted) {
+MatrixCall.prototype.isLocalVideoMuted = function() {
     if (!this.localAVStream) {
         return false;
     }
@@ -306,7 +306,7 @@ MatrixCall.prototype.setMicrophoneMuted = function(muted) {
  * @return {Boolean} True if the mic is muted, else false (including if the call
  * is not set up yet).
  */
-MatrixCall.prototype.isMicrophoneMuted = function(muted) {
+MatrixCall.prototype.isMicrophoneMuted = function() {
     if (!this.localAVStream) {
         return false;
     }