diff --git a/security/certverifier/ExtendedValidation.cpp b/security/certverifier/ExtendedValidation.cpp
index df2b31efb0e8..78f545497f80 100644
--- a/security/certverifier/ExtendedValidation.cpp
+++ b/security/certverifier/ExtendedValidation.cpp
@@ -10,7 +10,6 @@
 #include "certdb.h"
 #include "base64.h"
 #include "hasht.h"
-#include "pkix/stdkeywords.h"
 #include "pkix/pkixtypes.h"
 #include "pk11pub.h"
 #include "secerr.h"
diff --git a/security/manager/boot/src/PublicKeyPinningService.cpp b/security/manager/boot/src/PublicKeyPinningService.cpp
index 720157f925a4..69140a329629 100644
--- a/security/manager/boot/src/PublicKeyPinningService.cpp
+++ b/security/manager/boot/src/PublicKeyPinningService.cpp
@@ -13,7 +13,6 @@
 #include "nsSiteSecurityService.h"
 #include "nsString.h"
 #include "nsTArray.h"
-#include "pkix/stdkeywords.h"
 #include "pkix/pkixtypes.h"
 #include "prlog.h"
 #include "RootCertificateTelemetryUtils.h"
diff --git a/security/pkix/include/pkix/Input.h b/security/pkix/include/pkix/Input.h
index b924ab4ae93b..8ff9bb09243a 100644
--- a/security/pkix/include/pkix/Input.h
+++ b/security/pkix/include/pkix/Input.h
@@ -27,7 +27,6 @@
 
 #include <cstring>
 
-#include "pkix/stdkeywords.h"
 #include "pkix/Result.h"
 #include "stdint.h"
 
diff --git a/security/pkix/include/pkix/ScopedPtr.h b/security/pkix/include/pkix/ScopedPtr.h
index 238de61e3da6..41369b9e51ee 100644
--- a/security/pkix/include/pkix/ScopedPtr.h
+++ b/security/pkix/include/pkix/ScopedPtr.h
@@ -25,8 +25,6 @@
 #ifndef mozilla_pkix_ScopedPtr_h
 #define mozilla_pkix_ScopedPtr_h
 
-#include "pkix/stdkeywords.h"
-
 namespace mozilla { namespace pkix {
 
 // Similar to boost::scoped_ptr and std::unique_ptr. Does not support copying
diff --git a/security/pkix/include/pkix/Time.h b/security/pkix/include/pkix/Time.h
index 5365bd3e3700..9933438713ee 100644
--- a/security/pkix/include/pkix/Time.h
+++ b/security/pkix/include/pkix/Time.h
@@ -30,7 +30,6 @@
 #include <stdint.h>
 
 #include "pkix/Result.h"
-#include "pkix/stdkeywords.h"
 
 namespace mozilla { namespace pkix {
 
diff --git a/security/pkix/include/pkix/stdkeywords.h b/security/pkix/include/pkix/stdkeywords.h
deleted file mode 100644
index 655fcf3695af..000000000000
--- a/security/pkix/include/pkix/stdkeywords.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* vim: set ts=8 sts=2 et sw=2 tw=80: */
-/* This code is made available to you under your choice of the following sets
- * of licensing terms:
- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/.
- */
-/* Copyright 2013 Mozilla Contributors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef mozilla_pkix_stdkeywords_h
-#define mozilla_pkix_stdkeywords_h
-
-#if defined(__GNUC__) && !defined(__clang__)
-
-// GCC does not understand final/override until 4.7
-#if __GNUC__ * 100 + __GNUC_MINOR__ < 407
-#define final
-#define override
-#endif
-
-#endif // defined(__GNUC__) && !defined(__clang__)
-
-#endif // mozilla_pkix_stdkeywords_h