diff --git a/rtl/win/wininc/ascdef.inc b/rtl/win/wininc/ascdef.inc
index 778582d299..38fd811cc6 100644
--- a/rtl/win/wininc/ascdef.inc
+++ b/rtl/win/wininc/ascdef.inc
@@ -47,6 +47,7 @@
 
 function GetBinaryType(lpApplicationName:LPCSTR; lpBinaryType:LPDWORD):WINBOOL; external 'kernel32' name 'GetBinaryTypeA';
 function GetShortPathName(lpszLongPath:LPCSTR; lpszShortPath:LPSTR; cchBuffer:DWORD):DWORD; external 'kernel32' name 'GetShortPathNameA';
+function GetLongPathName(lpszShortPath:LPCSTR; lpszLongPath:LPSTR; cchBuffer:DWORD):DWORD; external 'kernel32' name 'GetLongPathNameA';
 function GetEnvironmentStrings : LPSTR; external 'kernel32' name 'GetEnvironmentStringsA';
 function FreeEnvironmentStrings(_para1:LPSTR):WINBOOL; external 'kernel32' name 'FreeEnvironmentStringsA';
 function FormatMessage(dwFlags:DWORD; lpSource:LPCVOID; dwMessageId:DWORD; dwLanguageId:DWORD; lpBuffer:LPSTR;nSize:DWORD; Arguments:va_list):DWORD; external 'kernel32' name 'FormatMessageA';
diff --git a/rtl/win/wininc/ascfun.inc b/rtl/win/wininc/ascfun.inc
index b34c3211ff..b775951f28 100644
--- a/rtl/win/wininc/ascfun.inc
+++ b/rtl/win/wininc/ascfun.inc
@@ -46,6 +46,7 @@
 
 function GetBinaryTypeA(lpApplicationName:LPCSTR; lpBinaryType:LPDWORD):WINBOOL; external 'kernel32' name 'GetBinaryTypeA';
 function GetShortPathNameA(lpszLongPath:LPCSTR; lpszShortPath:LPSTR; cchBuffer:DWORD):DWORD; external 'kernel32' name 'GetShortPathNameA';
+function GetLongPathNameA(lpszShortPath:LPCSTR; lpszLongPath:LPSTR; cchBuffer:DWORD):DWORD; external 'kernel32' name 'GetLongPathNameA';
 function GetEnvironmentStringsA:LPSTR; external 'kernel32' name 'GetEnvironmentStringsA';
 function FreeEnvironmentStringsA(_para1:LPSTR):WINBOOL; external 'kernel32' name 'FreeEnvironmentStringsA';
 function FormatMessageA(dwFlags:DWORD; lpSource:LPCVOID; dwMessageId:DWORD; dwLanguageId:DWORD; lpBuffer:LPSTR;nSize:DWORD; Arguments:va_list):DWORD; external 'kernel32' name 'FormatMessageA';
diff --git a/rtl/win/wininc/unidef.inc b/rtl/win/wininc/unidef.inc
index da566c503c..d6add7ec30 100644
--- a/rtl/win/wininc/unidef.inc
+++ b/rtl/win/wininc/unidef.inc
@@ -48,6 +48,7 @@
 
 function GetBinaryType(lpApplicationName:LPCWSTR; lpBinaryType:LPDWORD):WINBOOL; external 'kernel32' name 'GetBinaryTypeW';
 function GetShortPathName(lpszLongPath:LPCWSTR; lpszShortPath:LPWSTR; cchBuffer:DWORD):DWORD; external 'kernel32' name 'GetShortPathNameW';
+function GetLongPathName(lpszShortPath:LPCWSTR; lpszLongPath:LPWSTR; cchBuffer:DWORD):DWORD; external 'kernel32' name 'GetLongPathNameW';
 function GetEnvironmentStrings : LPWSTR; external 'kernel32' name 'GetEnvironmentStringsW';function FreeEnvironmentStrings(_para1:LPWSTR):WINBOOL; external 'kernel32' name 'FreeEnvironmentStringsW';
 function FormatMessage(dwFlags:DWORD; lpSource:LPCVOID; dwMessageId:DWORD; dwLanguageId:DWORD; lpBuffer:LPWSTR;nSize:DWORD; Arguments:va_list):DWORD; external 'kernel32' name 'FormatMessageW';
 function CreateMailslot(lpName:LPCWSTR; nMaxMessageSize:DWORD; lReadTimeout:DWORD; lpSecurityAttributes:LPSECURITY_ATTRIBUTES):HANDLE; external 'kernel32' name 'CreateMailslotW';
diff --git a/rtl/win/wininc/unifun.inc b/rtl/win/wininc/unifun.inc
index 9b37aac0af..e9c50b8759 100644
--- a/rtl/win/wininc/unifun.inc
+++ b/rtl/win/wininc/unifun.inc
@@ -48,6 +48,7 @@
 
 function GetBinaryTypeW(lpApplicationName:LPCWSTR; lpBinaryType:LPDWORD):WINBOOL; external 'kernel32' name 'GetBinaryTypeW';
 function GetShortPathNameW(lpszLongPath:LPCWSTR; lpszShortPath:LPWSTR; cchBuffer:DWORD):DWORD; external 'kernel32' name 'GetShortPathNameW';
+function GetLongPathNameW(lpszShortPath:LPCWSTR; lpszLongPath:LPWSTR; cchBuffer:DWORD):DWORD; external 'kernel32' name 'GetLongPathNameW';
 function GetEnvironmentStringsW:LPWSTR; external 'kernel32' name 'GetEnvironmentStringsW';function FreeEnvironmentStringsW(_para1:LPWSTR):WINBOOL; external 'kernel32' name 'FreeEnvironmentStringsW';
 function FormatMessageW(dwFlags:DWORD; lpSource:LPCVOID; dwMessageId:DWORD; dwLanguageId:DWORD; lpBuffer:LPWSTR;nSize:DWORD; Arguments:va_list):DWORD; external 'kernel32' name 'FormatMessageW';
 function CreateMailslotW(lpName:LPCWSTR; nMaxMessageSize:DWORD; lReadTimeout:DWORD; lpSecurityAttributes:LPSECURITY_ATTRIBUTES):HANDLE; external 'kernel32' name 'CreateMailslotW';