diff --git a/assets/controllers/elements/hoverpic_controller.js b/assets/controllers/elements/hoverpic_controller.js
index 1af8f921..5a5a9580 100644
--- a/assets/controllers/elements/hoverpic_controller.js
+++ b/assets/controllers/elements/hoverpic_controller.js
@@ -10,7 +10,7 @@ export default class extends Controller {
             trigger: 'hover',
             placement: 'right',
             container: 'body',
-            'title': this.element.dataset.title ?? null,
+            'title': this.element.dataset.title ?? '',
             content: function () {
                 return '<img class="img-fluid" src="' + thumbnail_url + '" />';
             }