diff --git a/src/extensions/scratch3_gdx_for/index.js b/src/extensions/scratch3_gdx_for/index.js
index ec6ebfb54..52e3aa594 100644
--- a/src/extensions/scratch3_gdx_for/index.js
+++ b/src/extensions/scratch3_gdx_for/index.js
@@ -26,7 +26,7 @@ const BLEUUID = {
 };
 
 /**
- * TODO
+ * Sensor ID numbers for the GDX-FOR.
  */
 const GDXFOR_SENSOR = {
     FORCE: 1,