diff --git a/src/base/Gateway.php b/src/base/Gateway.php
index 12df5105f6..0a5f95c908 100644
--- a/src/base/Gateway.php
+++ b/src/base/Gateway.php
@@ -62,7 +62,12 @@ public function getWebhookUrl(array $params = []): string
 
         $url = UrlHelper::actionUrl('commerce/webhooks/process-webhook', $params);
 
-        return StringHelper::replace($url, Craft::$app->getConfig()->getGeneral()->cpTrigger . '/', '');
+        // Remove the cpTrigger from the url if it's there.
+        if (Craft::$app->getConfig()->getGeneral()->cpTrigger) {
+            $url = StringHelper::replace($url, Craft::$app->getConfig()->getGeneral()->cpTrigger . '/', '');
+        }
+
+        return $url;
     }
 
     /**