diff --git a/dlls/kernel/computername.c b/dlls/kernel/computername.c
index 9fcda8e58f7..1caef93426d 100644
--- a/dlls/kernel/computername.c
+++ b/dlls/kernel/computername.c
@@ -643,3 +643,27 @@ BOOL WINAPI SetComputerNameExA( COMPUTER_NAME_FORMAT type, LPCSTR lpComputerName
         return FALSE;
     }
 }
+
+/***********************************************************************
+ *              DnsHostnameToComputerNameA         (KERNEL32.@)
+ */
+BOOL WINAPI DnsHostnameToComputerNameA(LPCSTR Hostname, LPSTR ComputerName,
+                              LPDWORD nSize)
+{
+    FIXME("(%s, %s, %08lx): stub\n", debugstr_a(Hostname),
+          debugstr_a(ComputerName), *nSize);
+    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
+    return FALSE;
+}
+
+/***********************************************************************
+ *              DnsHostnameToComputerNameW         (KERNEL32.@)
+ */
+BOOL WINAPI DnsHostnameToComputerNameW(LPCWSTR Hostname, LPWSTR ComputerName,
+                              LPDWORD nSize)
+{
+    FIXME("(%s, %s, %08lx): stub\n", debugstr_w(Hostname),
+          debugstr_w(ComputerName), *nSize);
+    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
+    return FALSE;
+}
diff --git a/dlls/kernel/kernel32.spec b/dlls/kernel/kernel32.spec
index 63445268783..f65789cc496 100644
--- a/dlls/kernel/kernel32.spec
+++ b/dlls/kernel/kernel32.spec
@@ -960,11 +960,14 @@
 @ stdcall CreateTimerQueueTimer(ptr long ptr ptr long long long) CreateTimerQueueTimer
 @ stdcall DeleteTimerQueueEx (long long) DeleteTimerQueueEx
 @ stdcall DeleteTimerQueueTimer(long long long) DeleteTimerQueueTimer
+@ stdcall DnsHostnameToComputerNameA (str ptr ptr) DnsHostnameToComputerNameA
+@ stdcall DnsHostnameToComputerNameW (wstr ptr ptr) DnsHostnameToComputerNameW
 @ stdcall GetCalendarInfoA(long long long ptr long ptr) GetCalendarInfoA
 @ stdcall GetCalendarInfoW(long long long ptr long ptr) GetCalendarInfoW
 @ stdcall GetSystemWindowsDirectoryA(ptr long) GetSystemWindowsDirectoryA
 @ stdcall GetSystemWindowsDirectoryW(ptr long) GetSystemWindowsDirectoryW
 @ stdcall InitializeCriticalSectionAndSpinCount(ptr long) InitializeCriticalSectionAndSpinCount
+@ stub PrivCopyFileExW
 @ stdcall ProcessIdToSessionId(long ptr) ProcessIdToSessionId
 @ stdcall SetCalendarInfoA(long long long str) SetCalendarInfoA
 @ stdcall SetCalendarInfoW(long long long wstr) SetCalendarInfoW
diff --git a/include/winbase.h b/include/winbase.h
index d518a00b35a..0a82687bc39 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -1223,6 +1223,9 @@ BOOL        WINAPI DeregisterEventSource(HANDLE);
 BOOL        WINAPI DeviceIoControl(HANDLE,DWORD,LPVOID,DWORD,LPVOID,DWORD,LPDWORD,LPOVERLAPPED);
 BOOL        WINAPI DisableThreadLibraryCalls(HMODULE);
 BOOL        WINAPI DisconnectNamedPipe(HANDLE);
+BOOL        WINAPI DnsHostnameToComputerNameA(LPCSTR,LPSTR,LPDWORD);
+BOOL        WINAPI DnsHostnameToComputerNameW(LPCWSTR,LPWSTR,LPDWORD);
+#define     DnsHostnameToComputerName WINELIB_NAME_AW(DnsHostnameToComputerName)
 BOOL        WINAPI DosDateTimeToFileTime(WORD,WORD,LPFILETIME);
 BOOL        WINAPI DuplicateHandle(HANDLE,HANDLE,HANDLE,HANDLE*,DWORD,BOOL,DWORD);
 BOOL        WINAPI EscapeCommFunction(HANDLE,UINT);