diff --git a/src/windows/ride.c b/src/windows/ride.c
index 559a85f569..b222be3b2a 100644
--- a/src/windows/ride.c
+++ b/src/windows/ride.c
@@ -1597,8 +1597,11 @@ static void window_ride_init_viewport(rct_window *w)
  */
 void window_ride_construct(rct_window *w)
 {
+	// Window may be closed by close by class so 
+	// make backup before calling.
+	uint8 rideIndex = w->number;
 	window_close_by_class(WC_RIDE_CONSTRUCTION);
-	ride_construct(w->number);
+	ride_construct(rideIndex);
 }
 
 /**