diff --git a/lib/RevBank/Cart.pm b/lib/RevBank/Cart.pm
index e1f5ab5..49be311 100644
--- a/lib/RevBank/Cart.pm
+++ b/lib/RevBank/Cart.pm
@@ -15,6 +15,10 @@ sub new {
 
 sub add {
     my ($self, $user, $amount, $description, $data) = @_;
+
+    # Note: 'repeat' plugin is currently dependent on this specific
+    # implementation!
+
     $data ||= {};
     my $item = {
         %$data,  # Internal stuff, not logged or printed.
diff --git a/plugins/repeat b/plugins/repeat
index 3359f07..eb4fa66 100755
--- a/plugins/repeat
+++ b/plugins/repeat
@@ -12,10 +12,11 @@ my $err_limit = "Repetition is limited at $limit items.";
 sub _do_repeat {
     my ($cart, $item, $num) = @_;
 
-    my $data = $item->{data};
-    $data->{_repeated} = 1;
+    $item->{_repeated} = 1;
 
-    $cart->add( @{ $item }{qw/user amount description/}, $data ) for 2..$num;
+    # Strongly dependent on the implementation of RevBank::Cart and the 'add'
+    # method. Bad idea, but meh.
+    $cart->add( @{ $item }{qw/user amount description/}, $item ) for 2..$num;
 }
 
 sub command {