diff --git a/webrtc/media/base/mediaengine.h b/webrtc/media/base/mediaengine.h
index 4fbb71b17c..dd1f5272a0 100644
--- a/webrtc/media/base/mediaengine.h
+++ b/webrtc/media/base/mediaengine.h
@@ -25,6 +25,7 @@
 #include "webrtc/media/base/codec.h"
 #include "webrtc/media/base/mediachannel.h"
 #include "webrtc/media/base/mediacommon.h"
+#include "webrtc/media/base/videocapturer.h"
 #include "webrtc/media/base/videocommon.h"
 #include "webrtc/modules/audio_coding/codecs/audio_decoder_factory.h"
 
@@ -39,6 +40,8 @@ class Call;
 
 namespace cricket {
 
+class VideoCapturer;
+
 struct RtpCapabilities {
   std::vector<webrtc::RtpExtension> header_extensions;
 };