diff --git a/reactos/dll/win32/kernel32/except/except.c b/reactos/dll/win32/kernel32/except/except.c
index 9659d8d08f2..7ef7c2d781f 100644
--- a/reactos/dll/win32/kernel32/except/except.c
+++ b/reactos/dll/win32/kernel32/except/except.c
@@ -278,7 +278,7 @@ RaiseException (
 	DWORD		dwExceptionCode,
 	DWORD		dwExceptionFlags,
 	DWORD		nNumberOfArguments,
-	CONST DWORD	* lpArguments		OPTIONAL
+	CONST ULONG_PTR	* lpArguments		OPTIONAL
 	)
 {
 	EXCEPTION_RECORD ExceptionRecord;
diff --git a/reactos/dll/win32/kernel32/file/iocompl.c b/reactos/dll/win32/kernel32/file/iocompl.c
index 24a2db77e17..229a54e511e 100644
--- a/reactos/dll/win32/kernel32/file/iocompl.c
+++ b/reactos/dll/win32/kernel32/file/iocompl.c
@@ -146,7 +146,7 @@ STDCALL
 PostQueuedCompletionStatus(
    HANDLE CompletionHandle,
    DWORD dwNumberOfBytesTransferred,
-   DWORD dwCompletionKey,
+   ULONG_PTR dwCompletionKey,
    LPOVERLAPPED lpOverlapped
    )
 {