--- a/dom/media/webrtc/MediaEngineWebRTC.cpp
+++ b/dom/media/webrtc/MediaEngineWebRTC.cpp
@@ -215,19 +215,16 @@ MediaEngineWebRTC::EnumerateVideoDevices
    * Enumeration is not neccessary if GIPS reports the same set of devices
    * for a given instance of the engine. Likewise, if a device was plugged out,
    * mVideoSources must be updated.
    */
   int num;
   num = mozilla::camera::GetChildAndCall(
     &mozilla::camera::CamerasChild::NumberOfCaptureDevices,
     capEngine);
-  if (num <= 0) {
-    return;
-  }
 
   for (int i = 0; i < num; i++) {
     char deviceName[MediaEngineSource::kMaxDeviceNameLength];
     char uniqueId[MediaEngineSource::kMaxUniqueIdLength];
 
     // paranoia
     deviceName[0] = '\0';
     uniqueId[0] = '\0';