diff --git a/rtc_base/BUILD.gn b/rtc_base/BUILD.gn
index 09fbe0fbd5..2dd4dc7a74 100644
--- a/rtc_base/BUILD.gn
+++ b/rtc_base/BUILD.gn
@@ -478,16 +478,6 @@ if (is_mac && !build_with_chromium) {
   }
 }
 
-rtc_source_set("base64") {
-  visibility = [ "*" ]
-  sources = [
-    "base64.h",
-  ]
-  deps = [
-    "third_party/base64",
-  ]
-}
-
 rtc_source_set("rtc_task_queue") {
   visibility = [ "*" ]
   deps = []
diff --git a/rtc_base/base64.h b/rtc_base/base64.h
deleted file mode 100644
index 56ebfc9431..0000000000
--- a/rtc_base/base64.h
+++ /dev/null
@@ -1,14 +0,0 @@
-/*
- *  Copyright 2018 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-// This is a temporary header file to move origin header from this location
-// to specified in include. Don't use this header directly, use included one
-// instead.
-#include "rtc_base/third_party/base64/base64.h"