diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index b5cb2e50c..9b06eac68 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,7 +1,11 @@
+2008-02-23  Chris Sutcliffe  <ir0nh34d@users.sourceforge.net>
+
+	* include/winnt.h (KEY_WOW64_64KEY, KEY_WOW64_32KEY): Define.
+
 2008-02-02  Chris Sutcliffe  <ir0nh34d@users.sourceforge.net>
 
-  * include/specstrings.h (IN, OUT, OPTIONAL): Remove.
-  * include/windef.h (IN, OUT, OPTIONAL): Define.
+	* include/specstrings.h (IN, OUT, OPTIONAL): Remove.
+	* include/windef.h (IN, OUT, OPTIONAL): Define.
 
 2008-02-02  Chris Sutcliffe  <ir0nh34d@users.sourceforge.net>
 
diff --git a/winsup/w32api/include/winnt.h b/winsup/w32api/include/winnt.h
index 3f63b56fb..21ef9d6e9 100644
--- a/winsup/w32api/include/winnt.h
+++ b/winsup/w32api/include/winnt.h
@@ -975,6 +975,10 @@ typedef DWORD FLONG;
 #define KEY_WRITE 0x20006
 #define KEY_EXECUTE 0x20019
 #define KEY_READ 0x20019
+#if (_WIN32_WINNT >= 0x0501)
+#define KEY_WOW64_64KEY 0x0100
+#define KEY_WOW64_32KEY 0x0200
+#endif
 #define KEY_ALL_ACCESS 0xf003f
 #define REG_WHOLE_HIVE_VOLATILE	1
 #define REG_REFRESH_HIVE	2