diff --git a/src/core/core.datasetController.js b/src/core/core.datasetController.js
index 0e7887253..110a6ca35 100644
--- a/src/core/core.datasetController.js
+++ b/src/core/core.datasetController.js
@@ -339,6 +339,7 @@ export default class DatasetController {
 	}
 
 	/**
+	 * @return {boolean} whether the data was modified
 	 * @private
 	 */
 	_dataCheck() {