diff --git a/module/VuFind/src/VuFind/ILS/Driver/DAIA.php b/module/VuFind/src/VuFind/ILS/Driver/DAIA.php
index e0486f56c34e6e5ef684592823e64aaa2fa80cff..23dc74cf688afb2816d00f608c92bd83390a6fc9 100644
--- a/module/VuFind/src/VuFind/ILS/Driver/DAIA.php
+++ b/module/VuFind/src/VuFind/ILS/Driver/DAIA.php
@@ -772,7 +772,7 @@ class DAIA extends AbstractBase implements
                     }
                 }
                 // attribute expected is mandatory for unavailable element
-                if (isset($unavailable['expected'])) {
+                if (!empty($unavailable['expected'])) {
                     try {
                         $duedate = $this->dateConverter
                             ->convertToDisplayDate(