diff --git a/js/h5p.js b/js/h5p.js
index 3644d37..8438b21 100644
--- a/js/h5p.js
+++ b/js/h5p.js
@@ -1643,7 +1643,7 @@ H5P.shuffleArray = function (array) {
  *   Reported time consumption/usage
  */
 H5P.setFinished = function (contentId, score, maxScore, time) {
-  if (H5PIntegration.postUserStatistics === true) {
+  if (typeof score === 'number' && H5PIntegration.postUserStatistics === true) {
     /**
      * Return unix timestamp for the given JS Date.
      *