diff --git a/video/win32_v.c b/video/win32_v.c
index 21b9d1e724..82d21c43be 100644
--- a/video/win32_v.c
+++ b/video/win32_v.c
@@ -202,7 +202,7 @@ static void CALLBACK TrackMouseTimerProc(HWND hwnd, UINT msg, UINT event, DWORD
 	 * Compare this with the current screen coordinates of the mouse and if it
 	 * falls outside of the area or our window we have left the window. */
 	GetClientRect(hwnd, &rc);
-	MapWindowPoints(hwnd, HWND_DESKTOP, (LPPOINT)&rc, 2);
+	MapWindowPoints(hwnd, HWND_DESKTOP, (LPPOINT)(LPRECT)&rc, 2);
 	GetCursorPos(&pt);
 
 	if (!PtInRect(&rc, pt) || (WindowFromPoint(pt) != hwnd)) {