diff --git a/dlls/user32/clipboard.c b/dlls/user32/clipboard.c
index 2e8a6614a76..55d410c34ea 100644
--- a/dlls/user32/clipboard.c
+++ b/dlls/user32/clipboard.c
@@ -29,7 +29,6 @@
 #include "winnls.h"
 #include "objidl.h"
 #include "shlobj.h"
-#include "wine/server.h"
 #include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(clipboard);
@@ -164,7 +163,7 @@ static HANDLE marshal_data( UINT format, HANDLE handle, size_t *ret_size )
         {
             char *ptr;
             if (!(size = GlobalSize( handle ))) return 0;
-            if ((data_size_t)size != size) return 0;
+            if ((UINT)size != size) return 0;
             if (size < sizeof(WCHAR)) return 0;
             if (!(ptr = GlobalLock( handle ))) return 0;
             /* enforce nul-termination the Windows way: ignoring alignment */
@@ -178,7 +177,7 @@ static HANDLE marshal_data( UINT format, HANDLE handle, size_t *ret_size )
         {
             char *ptr;
             if (!(size = GlobalSize( handle ))) return 0;
-            if ((data_size_t)size != size) return 0;
+            if ((UINT)size != size) return 0;
             if (!(ptr = GlobalLock( handle ))) return 0;
             ptr[size - 1] = 0;  /* enforce null-termination */
             GlobalUnlock( handle );
@@ -187,14 +186,14 @@ static HANDLE marshal_data( UINT format, HANDLE handle, size_t *ret_size )
         }
     default:
         if (!(size = GlobalSize( handle ))) return 0;
-        if ((data_size_t)size != size) return 0;
+        if ((UINT)size != size) return 0;
         *ret_size = size;
         return handle;
     }
 }
 
 /* rebuild the target handle from the data received in GetClipboardData */
-static HANDLE unmarshal_data( UINT format, void *data, data_size_t size )
+static HANDLE unmarshal_data( UINT format, void *data, UINT size )
 {
     HANDLE handle = GlobalReAlloc( data, size, GMEM_MOVEABLE );  /* release unused space */