diff --git a/demos/interpreter/backwards.html b/demos/interpreter/backwards.html
index 8b180f5e4..ccc5c66f4 100644
--- a/demos/interpreter/backwards.html
+++ b/demos/interpreter/backwards.html
@@ -156,7 +156,7 @@
 
     // Stack of serializations.  Each object contains three properties:
     //   .json: A full serialization of the interpreter's state.
-    //   .delta: Instead of a full serialization, a delta from the next sate.
+    //   .delta: Instead of a full serialization, a delta from the next state.
     //   .highlight: The ID of the block highlighted in this state.
     var serializationStack = [];