diff --git a/src/Element/BootstrapDate.php b/src/Element/BootstrapDate.php
index 556fbcb..3be96e8 100644
--- a/src/Element/BootstrapDate.php
+++ b/src/Element/BootstrapDate.php
@@ -90,7 +90,7 @@ class BootstrapDate extends FormElement {
     }
 
     // Load the Bootstrap datepicker title via data-provide attribute.
-    $settings['data-date-title'] = $element['#datepicker_title'];
+    $settings['data-date-title'] = $element['#datepicker_title'] ?? NULL;
 
     // Append our attributes to element.
     $element['#attributes'] += $settings;