diff --git a/win32/include/winapi/winuser.h b/win32/include/winapi/winuser.h
index 4cd9ffb5..9019db6c 100644
--- a/win32/include/winapi/winuser.h
+++ b/win32/include/winapi/winuser.h
@@ -1173,7 +1173,8 @@ extern "C" {
 #define WM_XBUTTONDOWN 0x020B
 #define WM_XBUTTONUP 0x020C
 #define WM_XBUTTONDBLCLK 0x020D
-#define WM_MOUSELAST 0x020D
+#define WM_MOUSEHWHEEL 0x020E
+#define WM_MOUSELAST 0x020E
 
 #define WHEEL_DELTA 120
 #define GET_WHEEL_DELTA_WPARAM(wParam) ((short)HIWORD(wParam))