diff --git a/reactos/dll/win32/wininet/http.c b/reactos/dll/win32/wininet/http.c
index 3ae7ac301b7..a27997e84c8 100644
--- a/reactos/dll/win32/wininet/http.c
+++ b/reactos/dll/win32/wininet/http.c
@@ -1689,7 +1689,9 @@ static DWORD HTTP_ReadChunked(WININETHTTPREQW *req, void *buffer, DWORD size, DW
 
         if (req->lpszCacheFile)
         {
-            if (!WriteFile(req->hCacheFile, p, bytes_read, NULL, NULL))
+            DWORD dwBytesWritten;
+
+            if (!WriteFile(req->hCacheFile, p, bytes_read, &dwBytesWritten, NULL))
                 WARN("WriteFile failed: %u\n", GetLastError());
         }
         p += bytes_read;
diff --git a/reactos/dll/win32/wininet/wininet_ros.diff b/reactos/dll/win32/wininet/wininet_ros.diff
index b326c853b98..f83345b96fc 100644
--- a/reactos/dll/win32/wininet/wininet_ros.diff
+++ b/reactos/dll/win32/wininet/wininet_ros.diff
@@ -1,5 +1,5 @@
 --- D:/Wine-CVS/wine/dlls/wininet/http.c	Wed May 28 14:33:28 2008
-+++ D:/ReactOS-Trunk/reactos/dll/win32/wininet/http.c	Sat May 31 11:59:23 2008
++++ D:/ReactOS-Trunk/reactos/dll/win32/wininet/http.c	Sun Jun 15 18:16:06 2008
 @@ -61,6 +61,8 @@
  #include "wine/debug.h"
  #include "wine/unicode.h"
@@ -20,6 +20,17 @@
          if(!res)
              WARN("WriteFile failed: %u\n", GetLastError());
      }
+@@ -1686,7 +1689,9 @@
+ 
+         if (req->lpszCacheFile)
+         {
+-            if (!WriteFile(req->hCacheFile, p, bytes_read, NULL, NULL))
++            DWORD dwBytesWritten;
++
++            if (!WriteFile(req->hCacheFile, p, bytes_read, &dwBytesWritten, NULL))
+                 WARN("WriteFile failed: %u\n", GetLastError());
+         }
+         p += bytes_read;
 --- D:/Wine-CVS/wine/dlls/wininet/internet.c	Wed May 28 14:33:28 2008
 +++ D:/ReactOS-Trunk/reactos/dll/win32/wininet/internet.c	Fri May 30 18:04:29 2008
 @@ -3101,19 +3101,22 @@