diff --git a/index.html b/index.html
index d27e22710f..364027b7b0 100644
--- a/index.html
+++ b/index.html
@@ -60,6 +60,7 @@ body {
 <body>
 <h1 id="header">Solidity realtime compiler and runtime</h1>
 Version: <span id="version">(loading)</span><br/>
+Execution environment does not connect to any node, everyhing is in-memory only.<br/>
 <b>Note:</b> If Chrome/Chromium reports &quot;Uncaught JavaScript Exception&quot;,
 enable the debug console (Ctrl+Shift+i) and reload.
 <div id="optimizeBox">
