diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index de4dbe47c..3611e0f54 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,3 +1,7 @@
+2003-03-28  Bang Jun-Young  <junyoung@netbsd.org>
+
+	* include/winnt.h (WAITORTIMERCALLBACKFUNC): Add typedef.
+
 2003-03-27  Danny Smith  <dannysmith@users.sourceforge.net>
 
 	* include/secext.h (GetComputerObjectName[AW],GetUserNameEx[AW],
diff --git a/winsup/w32api/include/winnt.h b/winsup/w32api/include/winnt.h
index e47dc6def..db1f36f6e 100644
--- a/winsup/w32api/include/winnt.h
+++ b/winsup/w32api/include/winnt.h
@@ -2982,6 +2982,7 @@ typedef struct _ADMINISTRATOR_POWER_POLICY {
 #include <poppack.h>
 #endif /* WINVER >= 0x0500 */
 
+typedef VOID (NTAPI *WAITORTIMERCALLBACKFUNC)(PVOID,BOOLEAN);
 
 #ifdef UNICODE
 typedef OSVERSIONINFOW OSVERSIONINFO,*POSVERSIONINFO,*LPOSVERSIONINFO;