diff --git a/brozzler/js-templates/umbraBehavior.js.j2 b/brozzler/js-templates/umbraBehavior.js.j2
index 7da1c47..1944e84 100644
--- a/brozzler/js-templates/umbraBehavior.js.j2
+++ b/brozzler/js-templates/umbraBehavior.js.j2
@@ -254,7 +254,7 @@ class UmbraBehavior {
     start() {
         var that = this;
         this.intervalId = setInterval(function() {
-            that.simplerIntervalFunc()
+            that.simpleIntervalFunc()
         }, this.intervalTimeMs);
     }