diff --git a/Ladybird/AndroidPlatform.cpp b/Ladybird/AndroidPlatform.cpp
index 73815ce2cc4..436e51766e7 100644
--- a/Ladybird/AndroidPlatform.cpp
+++ b/Ladybird/AndroidPlatform.cpp
@@ -4,8 +4,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include <AK/DeprecatedString.h>
 #include <AK/LexicalPath.h>
 #include <AK/Platform.h>
diff --git a/Ladybird/CMakeLists.txt b/Ladybird/CMakeLists.txt
index 53495a953e6..30f4ec6eeb9 100644
--- a/Ladybird/CMakeLists.txt
+++ b/Ladybird/CMakeLists.txt
@@ -66,6 +66,7 @@ else()
     set(SERENITY_SOURCE_DIR "${SERENITY_PROJECT_ROOT}")
 endif()
 
+add_compile_options(-DAK_DONT_REPLACE_STD)
 add_compile_options(-Wno-expansion-to-defined)
 add_compile_options(-Wno-user-defined-literals)
 
diff --git a/Ladybird/ConsoleWidget.cpp b/Ladybird/ConsoleWidget.cpp
index 761768ff262..00eb559b94a 100644
--- a/Ladybird/ConsoleWidget.cpp
+++ b/Ladybird/ConsoleWidget.cpp
@@ -7,8 +7,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include "ConsoleWidget.h"
 #include "Utilities.h"
 #include "WebContentView.h"
diff --git a/Ladybird/EventLoopPluginQt.cpp b/Ladybird/EventLoopPluginQt.cpp
index 766447cf08c..fe5b28de700 100644
--- a/Ladybird/EventLoopPluginQt.cpp
+++ b/Ladybird/EventLoopPluginQt.cpp
@@ -4,8 +4,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include "EventLoopPluginQt.h"
 #include "TimerQt.h"
 #include <AK/Function.h>
diff --git a/Ladybird/FontPluginQt.cpp b/Ladybird/FontPluginQt.cpp
index 78fd7125693..c98440f7734 100644
--- a/Ladybird/FontPluginQt.cpp
+++ b/Ladybird/FontPluginQt.cpp
@@ -5,8 +5,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include "FontPluginQt.h"
 #include <AK/DeprecatedString.h>
 #include <AK/String.h>
diff --git a/Ladybird/HelperProcess.h b/Ladybird/HelperProcess.h
index 5003e97c48e..6a42701ec23 100644
--- a/Ladybird/HelperProcess.h
+++ b/Ladybird/HelperProcess.h
@@ -6,8 +6,6 @@
 
 #pragma once
 
-#define AK_DONT_REPLACE_STD
-
 #include <AK/Error.h>
 #include <AK/Optional.h>
 #include <AK/Span.h>
diff --git a/Ladybird/ImageCodecPluginLadybird.cpp b/Ladybird/ImageCodecPluginLadybird.cpp
index 40faf29f55e..0172d2d384b 100644
--- a/Ladybird/ImageCodecPluginLadybird.cpp
+++ b/Ladybird/ImageCodecPluginLadybird.cpp
@@ -5,8 +5,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include "ImageCodecPluginLadybird.h"
 #include <LibGfx/Bitmap.h>
 #include <LibGfx/ImageFormats/ImageDecoder.h>
diff --git a/Ladybird/InspectorWidget.cpp b/Ladybird/InspectorWidget.cpp
index 7052e011538..a0894c40387 100644
--- a/Ladybird/InspectorWidget.cpp
+++ b/Ladybird/InspectorWidget.cpp
@@ -4,8 +4,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include <LibWebView/AccessibilityTreeModel.h>
 #include <LibWebView/DOMTreeModel.h>
 #include <LibWebView/StylePropertiesModel.h>
diff --git a/Ladybird/LocationEdit.h b/Ladybird/LocationEdit.h
index 20ed6771f19..f2607e0fc1b 100644
--- a/Ladybird/LocationEdit.h
+++ b/Ladybird/LocationEdit.h
@@ -6,8 +6,6 @@
 
 #pragma once
 
-#define AK_DONT_REPLACE_STD
-
 #include <QLineEdit>
 
 class LocationEdit final : public QLineEdit {
diff --git a/Ladybird/ModelTranslator.cpp b/Ladybird/ModelTranslator.cpp
index 31d61954deb..3d0f663c5e4 100644
--- a/Ladybird/ModelTranslator.cpp
+++ b/Ladybird/ModelTranslator.cpp
@@ -4,8 +4,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include "ModelTranslator.h"
 #include "Utilities.h"
 #include <QIcon>
diff --git a/Ladybird/RequestManagerQt.h b/Ladybird/RequestManagerQt.h
index 4c3d99ea905..eb7e13bb2ba 100644
--- a/Ladybird/RequestManagerQt.h
+++ b/Ladybird/RequestManagerQt.h
@@ -6,8 +6,6 @@
 
 #pragma once
 
-#define AK_DONT_REPLACE_STD
-
 #include <LibWeb/Loader/ResourceLoader.h>
 #include <QtNetwork/QNetworkAccessManager>
 #include <QtNetwork/QNetworkReply>
diff --git a/Ladybird/SQLServer/main.cpp b/Ladybird/SQLServer/main.cpp
index 70789c2f848..26c3ee25d23 100644
--- a/Ladybird/SQLServer/main.cpp
+++ b/Ladybird/SQLServer/main.cpp
@@ -4,8 +4,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include <AK/DeprecatedString.h>
 #include <LibCore/ArgsParser.h>
 #include <LibCore/Directory.h>
diff --git a/Ladybird/Settings.h b/Ladybird/Settings.h
index 9069ba09aa3..5dea619bb0f 100644
--- a/Ladybird/Settings.h
+++ b/Ladybird/Settings.h
@@ -6,8 +6,6 @@
 
 #pragma once
 
-#define AK_DONT_REPLACE_STD
-
 #include <AK/DeprecatedString.h>
 #include <QSettings>
 
diff --git a/Ladybird/Tab.h b/Ladybird/Tab.h
index 2ab47470eac..5a0a45906d8 100644
--- a/Ladybird/Tab.h
+++ b/Ladybird/Tab.h
@@ -7,8 +7,6 @@
 
 #pragma once
 
-#define AK_DONT_REPLACE_STD
-
 #include "LocationEdit.h"
 #include "WebContentView.h"
 #include <Browser/History.h>
diff --git a/Ladybird/TimerQt.cpp b/Ladybird/TimerQt.cpp
index 3692a635e22..39d6520dd2f 100644
--- a/Ladybird/TimerQt.cpp
+++ b/Ladybird/TimerQt.cpp
@@ -4,8 +4,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include "TimerQt.h"
 #include <AK/NonnullRefPtr.h>
 #include <QTimer>
diff --git a/Ladybird/Utilities.cpp b/Ladybird/Utilities.cpp
index 5fb1598d27a..dbc9e9a48d8 100644
--- a/Ladybird/Utilities.cpp
+++ b/Ladybird/Utilities.cpp
@@ -4,8 +4,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include "Utilities.h"
 #include <AK/LexicalPath.h>
 #include <AK/Platform.h>
diff --git a/Ladybird/WebContent/main.cpp b/Ladybird/WebContent/main.cpp
index ae8c4247979..0cb098aa3ee 100644
--- a/Ladybird/WebContent/main.cpp
+++ b/Ladybird/WebContent/main.cpp
@@ -4,8 +4,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include "../EventLoopPluginQt.h"
 #include "../FontPluginQt.h"
 #include "../ImageCodecPluginLadybird.h"
diff --git a/Ladybird/WebContentView.cpp b/Ladybird/WebContentView.cpp
index f2938e0111e..14ce3974f7c 100644
--- a/Ladybird/WebContentView.cpp
+++ b/Ladybird/WebContentView.cpp
@@ -5,8 +5,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include "WebContentView.h"
 #include "ConsoleWidget.h"
 #include "HelperProcess.h"
diff --git a/Ladybird/WebContentView.h b/Ladybird/WebContentView.h
index 3c4be3a4aa7..9b24cfe5180 100644
--- a/Ladybird/WebContentView.h
+++ b/Ladybird/WebContentView.h
@@ -7,8 +7,6 @@
 
 #pragma once
 
-#define AK_DONT_REPLACE_STD
-
 #include <AK/DeprecatedString.h>
 #include <AK/Function.h>
 #include <AK/HashMap.h>
diff --git a/Ladybird/WebDriver/main.cpp b/Ladybird/WebDriver/main.cpp
index f501597a726..5734753ba60 100644
--- a/Ladybird/WebDriver/main.cpp
+++ b/Ladybird/WebDriver/main.cpp
@@ -4,8 +4,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include "../HelperProcess.h"
 #include "../Utilities.h"
 #include <AK/Platform.h>
diff --git a/Ladybird/WebSocketImplQt.cpp b/Ladybird/WebSocketImplQt.cpp
index 81a30ee78a0..afa76aefa92 100644
--- a/Ladybird/WebSocketImplQt.cpp
+++ b/Ladybird/WebSocketImplQt.cpp
@@ -7,8 +7,6 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#define AK_DONT_REPLACE_STD
-
 #include "WebSocketImplQt.h"
 #include "Utilities.h"
 #include <LibCore/EventLoop.h>
diff --git a/Userland/Utilities/headless-browser.cpp b/Userland/Utilities/headless-browser.cpp
index 8c6420aca6e..c63fdfdb8b1 100644
--- a/Userland/Utilities/headless-browser.cpp
+++ b/Userland/Utilities/headless-browser.cpp
@@ -5,17 +5,12 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include <AK/Platform.h>
-
-#if !defined(AK_OS_SERENITY)
-#    define AK_DONT_REPLACE_STD
-#endif
-
 #include <AK/Badge.h>
 #include <AK/DeprecatedString.h>
 #include <AK/Function.h>
 #include <AK/LexicalPath.h>
 #include <AK/NonnullOwnPtr.h>
+#include <AK/Platform.h>
 #include <AK/String.h>
 #include <AK/URL.h>
 #include <AK/Vector.h>