diff --git a/viewer/document_view.cc b/viewer/document_view.cc
index b546f568c26..c43385f9066 100644
--- a/viewer/document_view.cc
+++ b/viewer/document_view.cc
@@ -6,7 +6,6 @@
 
 #include "base/bind.h"
 #include "base/location.h"
-#include "base/message_loop/message_loop_proxy.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_util.h"
 #include "base/thread_task_runner_handle.h"