diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index 2e0d072c8..0279ab1c7 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,3 +1,8 @@
+2002-05-02  Danny Smith  <dannysmith@users.sourceforge.net>
+
+	* include/winnt.h (THREAD_*, EVENT_*, MUTANT_*,
+	SEMAPHORE_*, MUTEX_*): Add new defines.
+
 2002-05-01  Manu B  <contact.manu@wanadoo.fr>
 
 	* include/commctrl.h (SNDMSG): Define and use throughout
diff --git a/winsup/w32api/include/winnt.h b/winsup/w32api/include/winnt.h
index 810d99158..3495180dc 100644
--- a/winsup/w32api/include/winnt.h
+++ b/winsup/w32api/include/winnt.h
@@ -275,8 +275,31 @@ typedef BYTE BOOLEAN,*PBOOLEAN;
 #define THREAD_IMPERSONATE	256
 #define THREAD_DIRECT_IMPERSONATION	0x200
 #define THREAD_ALL_ACCESS (STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|0x3FF)
+#define THREAD_BASE_PRIORITY_LOWRT	15
+#define THREAD_BASE_PRIORITY_MAX	2
+#define THREAD_BASE_PRIORITY_MIN	-2
+#define THREAD_BASE_PRIORITY_IDLE	-15
+#define THREAD_PRIORITY_LOWEST		THREAD_BASE_PRIORITY_MIN
+#define THREAD_PRIORITY_BELOW_NORMAL	THREAD_PRIORITY_LOWEST+1
+#define THREAD_PRIORITY_NORMAL		0
+#define THREAD_PRIORITY_HIGHEST		THREAD_BASE_PRIORITY_MAX
+#define THREAD_PRIORITY_ABOVE_NORMAL	(THREAD_PRIORITY_HIGHEST - 1)
+#define THREAD_PRIORITY_ERROR_RETURN	MAXLONG
+#define THREAD_PRIORITY_TIME_CRITICAL	THREAD_BASE_PRIORITY_LOWRT
+#define THREAD_PRIORITY_IDLE		THREAD_BASE_PRIORITY_IDLE
 #define EXCEPTION_NONCONTINUABLE	1
 #define EXCEPTION_MAXIMUM_PARAMETERS 15
+#define EVENT_MODIFY_STATE	0x0002
+#define EVENT_ALL_ACCESS	(STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|0x3)
+#define MUTANT_QUERY_STATE	0x0001
+#define MUTANT_ALL_ACCESS	(STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|MUTANT_QUERY_STATE)
+#define SEMAPHORE_MODIFY_STATE	0x0002
+#define SEMAPHORE_ALL_ACCESS 	(STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|0x3)
+#define MUTEX_MODIFY_STATE	MUTANT_QUERY_STATE
+#define MUTEX_ALL_ACCESS	MUTANT_ALL_ACCESS
+#define TIMER_QUERY_STATE	0x0001
+#define TIMER_MODIFY_STATE	0x0002
+#define TIMER_ALL_ACCESS	(STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|TIMER_QUERY_STATE|TIMER_MODIFY_STATE)
 /*
  * To prevent gcc compiler warnings, bracket these defines when initialising
  * a  SID_IDENTIFIER_AUTHORITY, eg.