diff --git a/src/openapi/customers/customers-trips.yaml b/src/openapi/customers/customers-trips.yaml
index 8675fe9..78c20af 100644
--- a/src/openapi/customers/customers-trips.yaml
+++ b/src/openapi/customers/customers-trips.yaml
@@ -30,6 +30,15 @@ paths:
           explode: false
           schema:
             type: integer
+        - name: xpto
+          in: query
+          required: false
+          schema:
+            type: boolean
+            default: false
+            example: false
+          description: >-
+            Determines whether also trips from other PTOs will be returned.
         - name: dateTimeFrom
           in: query
           required: false