diff --git a/dll/ntdll/include/ntdllp.h b/dll/ntdll/include/ntdllp.h
index 8164a294c13..4d6086730e7 100644
--- a/dll/ntdll/include/ntdllp.h
+++ b/dll/ntdll/include/ntdllp.h
@@ -147,7 +147,7 @@ VOID NTAPI
 LdrpFreeUnicodeString(PUNICODE_STRING String);
 
 VOID NTAPI
-LdrpGetShimEngineInterface();
+LdrpGetShimEngineInterface(VOID);
 
 VOID
 NTAPI
@@ -156,7 +156,7 @@ LdrpLoadShimEngine(IN PWSTR ImageName,
                    IN PVOID pShimData);
 
 VOID NTAPI
-LdrpUnloadShimEngine();
+LdrpUnloadShimEngine(VOID);
 
 
 /* FIXME: Cleanup this mess */
diff --git a/win32ss/printing/base/spoolss/main.c b/win32ss/printing/base/spoolss/main.c
index 01142edde8f..dcbb447e4c9 100644
--- a/win32ss/printing/base/spoolss/main.c
+++ b/win32ss/printing/base/spoolss/main.c
@@ -240,7 +240,7 @@ SplIsUpgrade()
 }
 
 BOOL WINAPI
-SpoolerInit()
+SpoolerInit(VOID)
 {
     // Nothing to do here yet
     SetLastError(ERROR_SUCCESS);
diff --git a/win32ss/printing/base/winspool/main.c b/win32ss/printing/base/winspool/main.c
index 7cf28de5770..97e09d7009e 100644
--- a/win32ss/printing/base/winspool/main.c
+++ b/win32ss/printing/base/winspool/main.c
@@ -84,7 +84,7 @@ DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 }
 
 BOOL WINAPI
-SpoolerInit()
+SpoolerInit(VOID)
 {
     BOOL bReturnValue = FALSE;
     DWORD dwErrorCode;
diff --git a/win32ss/printing/include/spoolss.h b/win32ss/printing/include/spoolss.h
index 6dc318023f3..a841fb29e02 100644
--- a/win32ss/printing/include/spoolss.h
+++ b/win32ss/printing/include/spoolss.h
@@ -68,7 +68,7 @@ PBYTE WINAPI PackStrings(PWSTR* pSource, PBYTE pDest, const DWORD* DestOffsets,
 PVOID WINAPI ReallocSplMem(PVOID pOldMem, DWORD cbOld, DWORD cbNew);
 BOOL WINAPI ReallocSplStr(PWSTR* ppwszString, PCWSTR pwszInput);
 BOOL WINAPI SplInitializeWinSpoolDrv(PVOID* pTable);
-BOOL WINAPI SpoolerInit();
+BOOL WINAPI SpoolerInit(VOID);
 PDWORD WINAPI UndoAlignRpcPtr(PVOID pDestinationBuffer, PVOID pSourceBuffer, DWORD cbBuffer, PDWORD pcbNeeded);
 
 #endif
diff --git a/win32ss/user/ntuser/ntuser.c b/win32ss/user/ntuser/ntuser.c
index d86e5634869..e44feb8db05 100644
--- a/win32ss/user/ntuser/ntuser.c
+++ b/win32ss/user/ntuser/ntuser.c
@@ -113,7 +113,7 @@ InitUserImpl(VOID)
 
 NTSTATUS
 NTAPI
-InitVideo();
+InitVideo(VOID);
 
 NTSTATUS
 NTAPI