diff --git a/public/typo3conf/ext/ep_products/Classes/Utility/BookingUrlUtility.php b/public/typo3conf/ext/ep_products/Classes/Utility/BookingUrlUtility.php
index 84aba729..7eb5bed8 100644
--- a/public/typo3conf/ext/ep_products/Classes/Utility/BookingUrlUtility.php
+++ b/public/typo3conf/ext/ep_products/Classes/Utility/BookingUrlUtility.php
@@ -71,7 +71,7 @@ class BookingUrlUtility
             }
         }
 
-        if ($paCode) {
+        if (null !== $paCode) {
             $query['agenturcode'] = $paCode;
         } elseif ($bpnCookie) {
             $query['agenturcode'] = $bpnCookie;
diff --git a/public/typo3conf/ext/ep_theme/Resources/Private/Assets/js/controllers/product_details_controller.js b/public/typo3conf/ext/ep_theme/Resources/Private/Assets/js/controllers/product_details_controller.js
index 793c8cf1..0c8b4d32 100644
--- a/public/typo3conf/ext/ep_theme/Resources/Private/Assets/js/controllers/product_details_controller.js
+++ b/public/typo3conf/ext/ep_theme/Resources/Private/Assets/js/controllers/product_details_controller.js
@@ -53,7 +53,9 @@ export default class extends Controller {
         this.loadingValue = true
         let paCode = this.getConfig().paCode
         const data = new URLSearchParams()
-        data.append('pa', paCode)
+        if (null !== paCode) {
+            data.append('pa', paCode)
+        }
         this.datesTableContainerTarget.innerHTML = ''
         fetch(`${this.datestableUriValue}&${data}`)
             .then(this.checkStatus)
@@ -73,7 +75,9 @@ export default class extends Controller {
         this.modeValue = 'prices'
         let paCode = this.getConfig().paCode
         const data = new URLSearchParams()
-        data.append('pa', paCode)
+        if (null !== paCode) {
+            data.append('pa', paCode)
+        }
         fetch(`${params.pricesUrl}&${data}`)
             .then(this.checkStatus)
             .then(this.parseHTML)