diff --git a/src/Subscriber/PaymentSubscriber.php b/src/Subscriber/PaymentSubscriber.php
index 5305a37b..0dbdf347 100644
--- a/src/Subscriber/PaymentSubscriber.php
+++ b/src/Subscriber/PaymentSubscriber.php
@@ -258,7 +258,10 @@ public function onShoppingCartLoaded(PageLoadedEvent $event)
             }
         }
 
-        $minorUnitsQuotient = $amountInMinorUnits / $page->getCart()->getPrice()->getTotalPrice();
+        $minorUnitsQuotient = 1;
+        if (0 < $page->getCart()->getPrice()->getTotalPrice()) {
+            $minorUnitsQuotient = $amountInMinorUnits / $page->getCart()->getPrice()->getTotalPrice();
+        }
 
         $page->addExtension(
             self::ADYEN_DATA_EXTENSION_ID,