diff --git a/Scripts/AppLoader.js b/Scripts/AppLoader.js
index 98ebb8480..340e46478 100644
--- a/Scripts/AppLoader.js
+++ b/Scripts/AppLoader.js
@@ -69,6 +69,7 @@ function newAppLoader() {
 
                 "Scales/RateScale.js",
                 "Scales/TimeScale.js",
+                "Scales/TimePeriodScale.js",
 
                 "BreakpointsBar.js",
                 "Plotter.js",