diff --git a/reactos/include/winreg.h b/reactos/include/winreg.h
index c121c4e20f2..619342d2df3 100644
--- a/reactos/include/winreg.h
+++ b/reactos/include/winreg.h
@@ -101,6 +101,7 @@ LONG WINAPI RegLoadMUIStringA(HKEY,LPCSTR,LPSTR,ULONG,ULONG,LPCSTR);
 LONG WINAPI RegLoadMUIStringW(HKEY,LPCWSTR,LPWSTR,ULONG,ULONG,LPCWSTR);
 #endif
 LONG WINAPI RegNotifyChangeKeyValue(HKEY,BOOL,DWORD,HANDLE,BOOL);
+LONG WINAPI RegOpenCurrentUser(REGSAM,PHKEY);
 LONG WINAPI RegOpenKeyA(HKEY,LPCSTR,PHKEY);
 LONG WINAPI RegOpenKeyExA(HKEY,LPCSTR,DWORD,REGSAM,PHKEY);
 LONG WINAPI RegOpenKeyExW(HKEY,LPCWSTR,DWORD,REGSAM,PHKEY);