diff --git a/webrtc/base/sequenced_task_checker_impl.cc b/webrtc/base/sequenced_task_checker_impl.cc
index 971cc65d38..615f44c2b5 100644
--- a/webrtc/base/sequenced_task_checker_impl.cc
+++ b/webrtc/base/sequenced_task_checker_impl.cc
@@ -12,6 +12,7 @@
 
 #include "webrtc/base/platform_thread.h"
 #include "webrtc/base/sequenced_task_checker.h"
+#include "webrtc/base/task_queue.h"
 
 namespace rtc {
 
diff --git a/webrtc/base/sequenced_task_checker_impl.h b/webrtc/base/sequenced_task_checker_impl.h
index 9b76ed6070..96cb32de6d 100644
--- a/webrtc/base/sequenced_task_checker_impl.h
+++ b/webrtc/base/sequenced_task_checker_impl.h
@@ -11,11 +11,11 @@
 #ifndef WEBRTC_BASE_SEQUENCED_TASK_CHECKER_IMPL_H_
 #define WEBRTC_BASE_SEQUENCED_TASK_CHECKER_IMPL_H_
 
-#include "webrtc/base/task_queue.h"
 #include "webrtc/base/thread_checker.h"
 
 namespace rtc {
 
+class TaskQueue;
 // Real implementation of SequencedTaskChecker, for use in debug mode, or
 // for temporary use in release mode.
 //