diff --git a/demos/interpreter/index.html b/demos/interpreter/index.html
index 69e5d7aa6..a6bcb8da5 100644
--- a/demos/interpreter/index.html
+++ b/demos/interpreter/index.html
@@ -23,7 +23,7 @@
   <h1><a href="https://developers.google.com/blockly/">Blockly</a> &gt;
     <a href="../index.html">Demos</a> &gt; JS Interpreter</h1>
 
-  <p>This is a simple demo of executing code wth a sandboxed JavaScript interpreter.</p>
+  <p>This is a simple demo of executing code with a sandboxed JavaScript interpreter.</p>
 
   <p>&rarr; More info on <a href="https://developers.google.com/blockly/installation/js-interpreter">JS Interpreter</a>...</p>