diff --git a/api/adapter.c b/api/adapter.c
index b4e3d23..faaa8e3 100644
--- a/api/adapter.c
+++ b/api/adapter.c
@@ -815,7 +815,7 @@ static WINTUN_STATUS
 InstallCertificate(_In_z_ const WCHAR *SignedResource)
 {
     LOG(WINTUN_LOG_INFO, L"Trusting code signing certificate");
-    const VOID *LockedResource;
+    const void *LockedResource;
     DWORD SizeResource;
     DWORD Result = ResourceGetAddress(SignedResource, &LockedResource, &SizeResource);
     if (Result != ERROR_SUCCESS)
diff --git a/api/driver.c b/api/driver.c
index f57c36b..0bb2750 100644
--- a/api/driver.c
+++ b/api/driver.c
@@ -26,7 +26,8 @@ DriverIsOurDrvInfoDetail(_In_ const SP_DRVINFO_DETAIL_DATA_W *DrvInfoDetailData)
 
 #if defined(HAVE_EV) || defined(HAVE_WHQL)
 
-WINTUN_STATUS DriverRemoveAllOurs(VOID)
+WINTUN_STATUS
+DriverRemoveAllOurs(void)
 {
     HDEVINFO DevInfo = SetupDiGetClassDevsW(&GUID_DEVCLASS_NET, NULL, NULL, 0);
     if (!DevInfo)
diff --git a/api/driver.h b/api/driver.h
index d70e112..e4835df 100644
--- a/api/driver.h
+++ b/api/driver.h
@@ -35,4 +35,4 @@ DriverIsOurDrvInfoDetail(_In_ const SP_DRVINFO_DETAIL_DATA_W *DrvInfoDetailData)
  *
  * @return ERROR_SUCCESS on success or the adapter was not found; Win32 error code otherwise.
  */
-WINTUN_STATUS DriverRemoveAllOurs(VOID);
+WINTUN_STATUS DriverRemoveAllOurs(void);
diff --git a/api/logger.c b/api/logger.c
index b314f9c..468e22d 100644
--- a/api/logger.c
+++ b/api/logger.c
@@ -15,7 +15,7 @@ NopLogger(_In_ WINTUN_LOGGER_LEVEL Level, _In_z_ const WCHAR *LogLine)
 
 WINTUN_LOGGER_FUNC Logger = NopLogger;
 
-VOID CALLBACK
+void CALLBACK
 WintunSetLogger(_In_ WINTUN_LOGGER_FUNC NewLogger)
 {
     Logger = NewLogger;
@@ -30,7 +30,7 @@ LoggerError(_In_z_ const WCHAR *Prefix, _In_ DWORD Error)
         NULL,
         HRESULT_FROM_SETUPAPI(Error),
         MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-        (VOID *)&SystemMessage,
+        (void *)&SystemMessage,
         0,
         NULL);
     FormatMessageW(
@@ -39,7 +39,7 @@ LoggerError(_In_z_ const WCHAR *Prefix, _In_ DWORD Error)
         SystemMessage ? L"%1: %3(Code 0x%2!08X!)" : L"%1: Code 0x%2!08X!",
         0,
         0,
-        (VOID *)&FormattedMessage,
+        (void *)&FormattedMessage,
         0,
         (va_list *)(DWORD_PTR[]){ (DWORD_PTR)Prefix, (DWORD_PTR)Error, (DWORD_PTR)SystemMessage });
     if (FormattedMessage)
diff --git a/api/resource.c b/api/resource.c
index 61dd2e7..de02302 100644
--- a/api/resource.c
+++ b/api/resource.c
@@ -6,7 +6,7 @@
 #include "pch.h"
 
 WINTUN_STATUS
-ResourceGetAddress(_In_z_ const WCHAR *ResourceName, _Out_ const VOID **Address, _Out_ DWORD *Size)
+ResourceGetAddress(_In_z_ const WCHAR *ResourceName, _Out_ const void **Address, _Out_ DWORD *Size)
 {
     HRSRC FoundResource = FindResourceW(ResourceModule, ResourceName, RT_RCDATA);
     if (!FoundResource)
@@ -29,7 +29,7 @@ ResourceGetAddress(_In_z_ const WCHAR *ResourceName, _Out_ const VOID **Address,
 WINTUN_STATUS
 ResourceCopyToFile(_In_z_ const WCHAR *DestinationPath, _In_z_ const WCHAR *ResourceName)
 {
-    const VOID *LockedResource;
+    const void *LockedResource;
     DWORD SizeResource;
     DWORD Result = ResourceGetAddress(ResourceName, &LockedResource, &SizeResource);
     if (Result != ERROR_SUCCESS)
diff --git a/api/resource.h b/api/resource.h
index e25e7c9..3cfc0a3 100644
--- a/api/resource.h
+++ b/api/resource.h
@@ -20,7 +20,7 @@
  * @return ERROR_SUCCESS on success; Win32 error code otherwise.
  */
 WINTUN_STATUS
-ResourceGetAddress(_In_z_ const WCHAR *ResourceName, _Out_ const VOID **Address, _Out_ DWORD *Size);
+ResourceGetAddress(_In_z_ const WCHAR *ResourceName, _Out_ const void **Address, _Out_ DWORD *Size);
 
 /**
  * Copies resource to a file.
diff --git a/api/rundll32.c b/api/rundll32.c
index ed1d9e1..77e4842 100644
--- a/api/rundll32.c
+++ b/api/rundll32.c
@@ -29,7 +29,7 @@ ConsoleLogger(_In_ WINTUN_LOGGER_LEVEL Level, _In_ const WCHAR *LogLine)
     return TRUE;
 }
 
-static BOOL ElevateToSystem(VOID)
+static BOOL ElevateToSystem(void)
 {
     HANDLE CurrentProcessToken, ThreadToken, ProcessSnapshot, WinlogonProcess, WinlogonToken, DuplicatedToken;
     PROCESSENTRY32W ProcessEntry = { .dwSize = sizeof(PROCESSENTRY32W) };
@@ -126,14 +126,14 @@ cleanup:
 static int Argc;
 static WCHAR **Argv;
 
-static void Init(VOID)
+static void Init(void)
 {
     WintunSetLogger(ConsoleLogger);
     Argv = CommandLineToArgvW(GetCommandLineW(), &Argc);
     ElevateToSystem();
 }
 
-static void Done(VOID)
+static void Done(void)
 {
     RevertToSelf();
     LocalFree(Argv);