diff --git a/Sources/Widgets/Core/AbstractWidget/Constants.js b/Sources/Widgets/Core/AbstractWidget/Constants.js
index e1fec6777e5..0e9733d3c97 100644
--- a/Sources/Widgets/Core/AbstractWidget/Constants.js
+++ b/Sources/Widgets/Core/AbstractWidget/Constants.js
@@ -1,3 +1,4 @@
+/** @type {number} The priority used for widget interaction in VTK.js. */
 export const WIDGET_PRIORITY = 0.5;
 
 export default { WIDGET_PRIORITY };