diff --git a/api/api.c b/api/api.c
index e7c4262..965f893 100644
--- a/api/api.c
+++ b/api/api.c
@@ -3,7 +3,7 @@
  * Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
  */
 
-#include "api.h"
+#include "pch.h"
 
 HINSTANCE ResourceModule;
 
diff --git a/api/api.vcxproj b/api/api.vcxproj
index b104d27..8383455 100644
--- a/api/api.vcxproj
+++ b/api/api.vcxproj
@@ -115,6 +115,8 @@
   <ItemDefinitionGroup>
     <ClCompile>
       <PreprocessorDefinitions>_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
     </ClCompile>
     <ResourceCompile>
       <AdditionalIncludeDirectories>..\$(WintunPlatform)\$(Configuration);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
@@ -156,12 +158,16 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="api.h" />
+    <ClInclude Include="pch.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="api.c" />
     <ClCompile Include="devmgmt.c" />
     <ClCompile Include="namespace.c" />
     <ClCompile Include="nci.c" />
+    <ClCompile Include="pch.c">
+      <PrecompiledHeader>Create</PrecompiledHeader>
+    </ClCompile>
     <ClCompile Include="registry.c" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
diff --git a/api/api.vcxproj.filters b/api/api.vcxproj.filters
index b418dd1..2016316 100644
--- a/api/api.vcxproj.filters
+++ b/api/api.vcxproj.filters
@@ -28,6 +28,9 @@
     <ClInclude Include="api.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="pch.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="api.c">
@@ -45,5 +48,8 @@
     <ClCompile Include="registry.c">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="pch.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/api/devmgmt.c b/api/devmgmt.c
index b8b594d..7f6d735 100644
--- a/api/devmgmt.c
+++ b/api/devmgmt.c
@@ -3,12 +3,7 @@
  * Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
  */
 
-#include "api.h"
-#include <cfgmgr32.h>
-#include <iphlpapi.h>
-#include <objbase.h>
-#include <SetupAPI.h>
-#include <wchar.h>
+#include "pch.h"
 
 #define WINTUN_HWID L"Wintun"
 #define WAIT_FOR_REGISTRY_TIMEOUT 10000 /* ms */
diff --git a/api/namespace.c b/api/namespace.c
index 6020469..7807847 100644
--- a/api/namespace.c
+++ b/api/namespace.c
@@ -3,9 +3,7 @@
  * Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
  */
 
-#include "api.h"
-#include <bcrypt.h>
-#include <sddl.h>
+#include "pch.h"
 
 static SECURITY_ATTRIBUTES SecurityAttributes = { .nLength = sizeof(SECURITY_ATTRIBUTES) };
 static BOOL HasInitialized = FALSE;
diff --git a/api/nci.c b/api/nci.c
index 52b8e54..119d5e9 100644
--- a/api/nci.c
+++ b/api/nci.c
@@ -3,7 +3,7 @@
  * Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
  */
 
-#include "api.h"
+#include "pch.h"
 
 static HMODULE NciModule;
 
diff --git a/api/pch.c b/api/pch.c
new file mode 100644
index 0000000..6ea6d44
--- /dev/null
+++ b/api/pch.c
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
+ */
+
+#include "pch.h"
diff --git a/api/pch.h b/api/pch.h
new file mode 100644
index 0000000..5767deb
--- /dev/null
+++ b/api/pch.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
+ */
+
+#pragma once
+
+#include "api.h"
+
+#include <bcrypt.h>
+#include <cfgmgr32.h>
+#include <iphlpapi.h>
+#include <objbase.h>
+#include <sddl.h>
+#include <SetupAPI.h>
+#include <string.h>
+#include <wchar.h>
diff --git a/api/registry.c b/api/registry.c
index 53af8bb..d75f635 100644
--- a/api/registry.c
+++ b/api/registry.c
@@ -3,9 +3,7 @@
  * Copyright (C) 2018-2020 WireGuard LLC. All Rights Reserved.
  */
 
-#include "api.h"
-#include <string.h>
-#include <wchar.h>
+#include "pch.h"
 
 static WINTUN_STATUS
 OpenKeyWait(_In_ HKEY Key, _Inout_z_ LPWSTR Path, _In_ DWORD Access, _In_ ULONGLONG Deadline, _Out_ HKEY *KeyOut)