diff --git a/winsup/w32api/ChangeLog b/winsup/w32api/ChangeLog
index 8dc447559..11bc67dd2 100644
--- a/winsup/w32api/ChangeLog
+++ b/winsup/w32api/ChangeLog
@@ -1,3 +1,8 @@
+2005-01-26  Danny Smith  <dannysmith@users.sourceforge.net>
+
+	* include/winuser.h (SW_SMOOTHSCROLL): Add define. 
+	Reported by: Christian Ehrlicher  <chehrlic@users.sf.net>
+
 2005-01-21  Chris Sutcliffe  <ir0nh34d@users.sourceforge.net>
 
 	* include/commdlg.h (OFN_DONTADDTORECENT): Added definition.
diff --git a/winsup/w32api/include/winuser.h b/winsup/w32api/include/winuser.h
index c8881e7f1..892ffe841 100644
--- a/winsup/w32api/include/winuser.h
+++ b/winsup/w32api/include/winuser.h
@@ -2079,6 +2079,9 @@ extern "C" {
 #define SW_SCROLLCHILDREN 1
 #define SW_INVALIDATE 2
 #define SW_ERASE 4
+#if (_WIN32_WINDOWS >= 0x0410 || _WIN32_WINNT >= 0x0500)
+#define SW_SMOOTHSCROLL	0x0010
+#endif /* (_WIN32_WINDOWS >= 0x0410 || _WIN32_WINNT >= 0x0500) */
 #define SC_SIZE 0xF000
 #define SC_MOVE 0xF010
 #define SC_MINIMIZE 0xF020