diff --git a/lib/RevBank/Cart.pm b/lib/RevBank/Cart.pm
index 9357300..4a96cf5 100644
--- a/lib/RevBank/Cart.pm
+++ b/lib/RevBank/Cart.pm
@@ -118,13 +118,15 @@ sub entries($self, $attribute = undef) {
     return @entries;
 }
 
-sub changed($self) {
+sub changed($self, $keep = 0) {
     my $changed = 0;
     for my $entry ($self->entries('changed')) {
-        $entry->attribute('changed', undef);
+        $entry->attribute('changed', undef) unless $keep;
         $changed = 1;
     }
-    $changed = 1 if delete $self->{changed};
+    $changed = 1 if $self->{changed};
+    delete $self->{changed} unless $keep;
+
     return $changed;
 }
 
diff --git a/plugins/statiegeld_tokens b/plugins/statiegeld_tokens
index a3d7720..6c0d7c7 100644
--- a/plugins/statiegeld_tokens
+++ b/plugins/statiegeld_tokens
@@ -180,9 +180,8 @@ sub hook_checkout_prepare($class, $cart, $username, $transaction_id, @) {
 
 	return ABORT if %warnings_by_type and not $cart->size;
 
-	if (%warnings_by_type and $cart->changed) {  # resets 'changed' attr.
-		print "\n";         # Between warnings and transaction overview
-		$cart->changed(1);  # restore attribute
+	if (%warnings_by_type and $cart->changed(1)) {
+		print "\n";  # Between warnings and transaction overview
 	}
 
 	return;