diff --git a/src/app/spreed-webrtc-server/room_manager.go b/src/app/spreed-webrtc-server/room_manager.go
index 76a77faa..94ae53d2 100644
--- a/src/app/spreed-webrtc-server/room_manager.go
+++ b/src/app/spreed-webrtc-server/room_manager.go
@@ -65,7 +65,9 @@ func NewRoomManager(config *Config, encoder OutgoingEncoder) RoomManager {
 		OutgoingEncoder: encoder,
 		roomTable:       make(map[string]RoomWorker),
 	}
-	rm.globalRoomID = rm.MakeRoomID(config.globalRoomID, "")
+	if config.globalRoomID != "" {
+		rm.globalRoomID = rm.MakeRoomID(config.globalRoomID, "")
+	}
 	rm.defaultRoomID = rm.MakeRoomID("", "")
 	return rm
 }
@@ -120,7 +122,7 @@ func (rooms *roomManager) Broadcast(sessionID, roomID string, outgoing *DataOutg
 		return
 	}
 
-	if roomID != "" && roomID == rooms.globalRoomID {
+	if roomID == rooms.globalRoomID {
 		rooms.RLock()
 		for _, room := range rooms.roomTable {
 			room.Broadcast(sessionID, message)
diff --git a/static/js/directives/settings.js b/static/js/directives/settings.js
index f145b6de..43c9f9a2 100644
--- a/static/js/directives/settings.js
+++ b/static/js/directives/settings.js
@@ -209,6 +209,8 @@ define(['jquery', 'underscore', 'text!partials/settings.html'], function($, _, t
 					// https://code.google.com/p/webrtc/source/browse/trunk/talk/app/webrtc/localaudiosource.cc (audio constraints)
 					// https://code.google.com/p/webrtc/source/browse/trunk/talk/app/webrtc/webrtcsession.cc (pc constraints)
 
+					c.add("pc", "googCpuOveruseDetection", settings.videoCpuOveruseDetection && true); // defaults to true in Chrome
+
 					// Experimental audio settings.
 					if (settings.experimental.enabled) {
 						c.add("audio", "googEchoCancellation", true); // defaults to true
@@ -216,7 +218,7 @@ define(['jquery', 'underscore', 'text!partials/settings.html'], function($, _, t
 						c.add("audio", "googAutoGainControl", true); // defaults to true
 						c.add("audio", "googAutoGainControl2", settings.experimental.audioAutoGainControl2 && true); // defaults to false in Chrome
 						c.add("audio", "googNoiseSuppression", true); // defaults to true
-						c.add("audio", "googgNoiseSuppression2", settings.experimental.audioNoiseSuppression2 && true); // defaults to false in Chrome
+						c.add("audio", "googNoiseSuppression2", settings.experimental.audioNoiseSuppression2 && true); // defaults to false in Chrome
 						c.add("audio", "googHighpassFilter", true); // defaults to true
 						c.add("audio", "googTypingNoiseDetection", settings.experimental.audioTypingNoiseDetection && true); // defaults to true in Chrome
 					}
@@ -239,7 +241,6 @@ define(['jquery', 'underscore', 'text!partials/settings.html'], function($, _, t
 						c.add(["video", "screensharing"], "googLeakyBucket", settings.experimental.videoLeakyBucket && true); // defaults to false in Chrome
 						// Removes the noise in the captured video stream at the expense of CPU.
 						c.add(["video", "screensharing"], "googNoiseReduction", settings.experimental.videoNoiseReduction && true); // defaults to false in Chrome
-						c.add("pc", "googCpuOveruseDetection", settings.experimental.videoCpuOveruseDetection && true); // defaults to true in Chrome
 
 					}
 
diff --git a/static/js/services/constraints.js b/static/js/services/constraints.js
index 87fe4693..eefb8c5a 100644
--- a/static/js/services/constraints.js
+++ b/static/js/services/constraints.js
@@ -75,7 +75,7 @@
 					// Optional constraints are arrays.
 					var d = {};
 					d[k] = v;
-					obj.push(d)
+					obj.push(d);
 				}
 			}
 		};