diff --git a/templates/stream.html b/templates/stream.html
index 7f62518..135147c 100755
--- a/templates/stream.html
+++ b/templates/stream.html
@@ -92,6 +92,7 @@
                 watchArea.area.Max.X, watchArea.area.Max.Y,
                 watchArea.color.R, watchArea.color.G, watchArea.color.B
             ));
+            _watchAreas = null;
         }); 
     }
 </script>