diff --git a/include/winbase.h b/include/winbase.h
index 32e371b..bab81ea 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -1463,6 +1463,7 @@
 BOOL        WINAPI GetThreadContext(HANDLE,CONTEXT *);
 LCID        WINAPI GetThreadLocale(void);
 INT       WINAPI GetThreadPriority(HANDLE);
+BOOL        WINAPI GetThreadPriorityBoost(HANDLE,PBOOL);
 BOOL      WINAPI GetThreadSelectorEntry(HANDLE,DWORD,LPLDT_ENTRY);
 BOOL        WINAPI GetThreadTimes(HANDLE,LPFILETIME,LPFILETIME,LPFILETIME,LPFILETIME);
 BOOL        WINAPI GetTokenInformation(HANDLE,TOKEN_INFORMATION_CLASS,LPVOID,DWORD,LPDWORD);
@@ -1612,6 +1613,7 @@
 BOOL        WINAPI SetThreadContext(HANDLE,const CONTEXT *);
 BOOL        WINAPI SetThreadLocale(LCID);
 BOOL        WINAPI SetThreadPriority(HANDLE,INT);
+BOOL        WINAPI SetThreadPriorityBoost(HANDLE,BOOL);
 BOOL        WINAPI SetThreadToken(PHANDLE,HANDLE);
 BOOL        WINAPI SetTimeZoneInformation(const LPTIME_ZONE_INFORMATION);
 BOOL        WINAPI SetWaitableTimer(HANDLE,const LARGE_INTEGER*,LONG,PTIMERAPCROUTINE,LPVOID,BOOL);