diff --git a/dlls/ntdll/file.c b/dlls/ntdll/file.c
index c7db40e986a..a111cf70642 100644
--- a/dlls/ntdll/file.c
+++ b/dlls/ntdll/file.c
@@ -491,3 +491,18 @@ NTSTATUS WINAPI NtQueryVolumeInformationFile (
 	IoStatusBlock->Information = len;
 	return STATUS_SUCCESS;
 }
+
+/******************************************************************
+ *		NtFlushBuffersFile  (NTDLL.@)
+ */
+NTSTATUS WINAPI NtFlushBuffersFile( HANDLE hFile, IO_STATUS_BLOCK* IoStatusBlock )
+{
+    NTSTATUS ret;
+    SERVER_START_REQ( flush_file )
+    {
+        req->handle = hFile;
+        ret = wine_server_call( req );
+    }
+    SERVER_END_REQ;
+    return ret;
+}
diff --git a/dlls/ntdll/ntdll.spec b/dlls/ntdll/ntdll.spec
index 55729526837..35d711de142 100644
--- a/dlls/ntdll/ntdll.spec
+++ b/dlls/ntdll/ntdll.spec
@@ -107,7 +107,7 @@
 @ stdcall NtEnumerateKey (long long long long long long)
 @ stdcall NtEnumerateValueKey (long long long long long long)
 @ stub NtExtendSection
-@ stub NtFlushBuffersFile
+@ stdcall NtFlushBuffersFile(long ptr)
 @ stub NtFlushInstructionCache
 @ stdcall NtFlushKey(long)
 @ stdcall NtFlushVirtualMemory(long ptr ptr long)
@@ -441,7 +441,7 @@
 @ stdcall RtlInt64ToUnicodeString(long long long ptr)
 @ stdcall RtlIntegerToChar(long long long ptr)
 @ stdcall RtlIntegerToUnicodeString(long long ptr)
-@ stdcall RtlIsDosDeviceName_U(wstr) RtlIsDosDeviceName_U
+@ stdcall RtlIsDosDeviceName_U(wstr)
 @ stub RtlIsGenericTableEmpty
 @ stdcall RtlIsNameLegalDOS8Dot3(ptr ptr ptr)
 @ stdcall RtlIsTextUnicode(ptr long ptr)
@@ -634,7 +634,7 @@
 @ stdcall ZwEnumerateKey(long long long ptr long ptr) NtEnumerateKey
 @ stdcall ZwEnumerateValueKey(long long long ptr long ptr) NtEnumerateValueKey
 @ stub ZwExtendSection
-@ stub ZwFlushBuffersFile
+@ stdcall ZwFlushBuffersFile(long ptr) NtFlushBuffersFile
 @ stub ZwFlushInstructionCache
 @ stdcall ZwFlushKey(long) NtFlushKey
 @ stdcall ZwFlushVirtualMemory(long ptr ptr long) NtFlushVirtualMemory
diff --git a/files/file.c b/files/file.c
index 0313936bbe9..9e45fa0c744 100644
--- a/files/file.c
+++ b/files/file.c
@@ -2361,14 +2361,17 @@ UINT WINAPI SetHandleCount( UINT count )
  */
 BOOL WINAPI FlushFileBuffers( HANDLE hFile )
 {
-    BOOL ret;
-    SERVER_START_REQ( flush_file )
+    NTSTATUS            nts;
+    IO_STATUS_BLOCK     ioblk;
+
+    nts = NtFlushBuffersFile( hFile, &ioblk );
+    if (nts != STATUS_SUCCESS)
     {
-        req->handle = hFile;
-        ret = !wine_server_call_err( req );
+        SetLastError( RtlNtStatusToDosError( nts ) );
+        return FALSE;
     }
-    SERVER_END_REQ;
-    return ret;
+
+    return TRUE;
 }
 
 
diff --git a/include/winternl.h b/include/winternl.h
index 97c4d5c186b..44a44243d38 100644
--- a/include/winternl.h
+++ b/include/winternl.h
@@ -850,6 +850,7 @@ NTSTATUS  WINAPI NtDeviceIoControlFile(HANDLE,HANDLE,PIO_APC_ROUTINE,PVOID,PIO_S
 NTSTATUS  WINAPI NtDuplicateObject(HANDLE,HANDLE,HANDLE,PHANDLE,ACCESS_MASK,ULONG,ULONG);
 NTSTATUS  WINAPI NtEnumerateKey(HKEY,ULONG,KEY_INFORMATION_CLASS,void *,DWORD,DWORD *);
 NTSTATUS  WINAPI NtEnumerateValueKey(HKEY,ULONG,KEY_VALUE_INFORMATION_CLASS,PVOID,ULONG,PULONG);
+NTSTATUS  WINAPI NtFlushBuffersFile(HANDLE,IO_STATUS_BLOCK*);
 NTSTATUS  WINAPI NtFlushKey(HKEY);
 NTSTATUS  WINAPI NtFlushVirtualMemory(HANDLE,LPCVOID*,ULONG*,ULONG);
 NTSTATUS  WINAPI NtFreeVirtualMemory(HANDLE,PVOID*,ULONG*,ULONG);