diff --git a/booking.stripe.inc b/booking.stripe.inc
index 93505d0..31f5663 100644
--- a/booking.stripe.inc
+++ b/booking.stripe.inc
@@ -208,7 +208,7 @@ function booking_stripe_validate_form_payment($form, &$form_state) {
           "first_name" => $first_name,
       ),
     ));
-    watchdog('booking_debug', "<pre>Stripe payment charge results:\n@info</pre>", array('@info' => print_r( $charge->__toJSON(), true)));    
+    watchdog('booking_debug', "<pre>Stripe payment charge results:\n@info</pre>", array('@info' => print_r( $charge->toJSON(), true)));    
     if ($charge && $charge->paid) {
       //watchdog('booking_debug', 'Charge created successfully');
       _booking_process_stripe_payment($charge, $token);