diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index 55d44f82a..57459b3bd 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,3 +1,7 @@
+2003-04-07 Marcel Telka <telka@users.sourceforge.net>
+
+	* include/ddk/winddk.h (KIRQL): Typedef as UCHAR. not ULONG.
+
 2003-03-30  Hans E. Molin  <kvasi@users.sourceforge.net>
 
 	* include/olectl.h (OleLoadPicturePath): Correct prototype.
diff --git a/winsup/w32api/include/ddk/winddk.h b/winsup/w32api/include/ddk/winddk.h
index e02c56e9a..986313369 100644
--- a/winsup/w32api/include/ddk/winddk.h
+++ b/winsup/w32api/include/ddk/winddk.h
@@ -127,7 +127,7 @@ static inline struct _KPCR * KeGetCurrentKPCR(
 */
 
 typedef LONG KPRIORITY;
-typedef ULONG KIRQL, *PKIRQL;
+typedef UCHAR KIRQL, *PKIRQL;
 typedef ULONG_PTR KSPIN_LOCK, *PKSPIN_LOCK;
 typedef ULONG KAFFINITY, *PKAFFINITY;
 typedef CCHAR KPROCESSOR_MODE;