diff --git a/reactos/dll/win32/user32/windows/clipboard.c b/reactos/dll/win32/user32/windows/clipboard.c
index 61b11b79dd6..3634e65c87f 100644
--- a/reactos/dll/win32/user32/windows/clipboard.c
+++ b/reactos/dll/win32/user32/windows/clipboard.c
@@ -59,21 +59,21 @@ GetClipboardData(UINT uFormat)
     /* dealing with bitmap object */
     if (uFormat != CF_BITMAP)
     {
-        size = NtUserGetClipboardData(uFormat, NULL);
+        size = (DWORD_PTR)NtUserGetClipboardData(uFormat, NULL);
 
         if (size)
         {
             hGlobal = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, size);
             pGlobal = GlobalLock(hGlobal);
 
-            size = NtUserGetClipboardData(uFormat, pGlobal);
+            size = (DWORD_PTR)NtUserGetClipboardData(uFormat, pGlobal);
 
             GlobalUnlock(hGlobal);
         }
     }
     else
     {
-        hGlobal = (HANDLE)NtUserGetClipboardData(CF_BITMAP, NULL);
+        hGlobal = NtUserGetClipboardData(CF_BITMAP, NULL);
     }
 
     return hGlobal;
diff --git a/reactos/include/reactos/win32k/ntuser.h b/reactos/include/reactos/win32k/ntuser.h
index d1ba0713ee4..b4fb469c3f7 100644
--- a/reactos/include/reactos/win32k/ntuser.h
+++ b/reactos/include/reactos/win32k/ntuser.h
@@ -2881,7 +2881,7 @@ BOOL
 NTAPI
 NtUserTranslateMessage(
   LPMSG lpMsg,
-  HKL dwhkl );
+  UINT flags );
 
 BOOL
 NTAPI