diff --git a/commerce_coupon.module b/commerce_coupon.module
index c6ef502..97c2133 100644
--- a/commerce_coupon.module
+++ b/commerce_coupon.module
@@ -1237,8 +1237,10 @@ function commerce_coupon_order_discount_ids($order) {
   }
 
   // Add the set of discounts directly referenced on the order.
-  foreach ($order_wrapper->commerce_discounts->raw() as $discount_id) {
-    $order_discount_ids[] = $discount_id;
+  if (isset($order_wrapper->commerce_discounts)) {
+    foreach ($order_wrapper->commerce_discounts->raw() as $discount_id) {
+      $order_discount_ids[] = $discount_id;
+    }
   }
 
   $order_discount_ids = array_unique($order_discount_ids);