diff --git a/examples/bind-input.html b/examples/bind-input.html
index b944dbe77d..33f6a66ea7 100644
--- a/examples/bind-input.html
+++ b/examples/bind-input.html
@@ -41,6 +41,7 @@
           <p id="shortdesc">Demonstrates two-way binding of HTML input elements to OpenLayers objects.</p>
           <div id="docs">
             <p>See the <a href="bind-input.js" target="_blank">bind-input.js source</a> to see how this is done.</p>
+            <p>Note: hue, saturation, contrast and brightness effects only work with WebGL (in WebGL-capable browsers).</p>
           </div>
           <div id="tags">input, bind, openstreetmap</div>
         </div>