diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index 8438d6770..de1780336 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,3 +1,7 @@
+2004-11-12  Loïc Guilloux (glx@users.sourceforge.net> 
+
+	* include/winuser.h (WM_THEMECHANGED): Add define.
+
 2004-11-11  Danny Smith  <dannysmith@users.sourceforge.net>
 
 	* include/ddk/winddk.h (ExAllocateFromPagedLookasideList,
diff --git a/winsup/w32api/include/winuser.h b/winsup/w32api/include/winuser.h
index c256f3fe9..d22a35ae0 100644
--- a/winsup/w32api/include/winuser.h
+++ b/winsup/w32api/include/winuser.h
@@ -1420,6 +1420,7 @@ extern "C" {
 #define WM_SYSKEYDOWN 260
 #define WM_SYSKEYUP 261
 #define WM_TCARD 82
+#define WM_THEMECHANGED 794
 #define WM_TIMECHANGE 30
 #define WM_TIMER 275
 #define WM_UNDO 772