diff --git a/src/Hanafuda.hs b/src/Hanafuda.hs
index 408136a..b8f8da8 100644
--- a/src/Hanafuda.hs
+++ b/src/Hanafuda.hs
@@ -5,6 +5,7 @@ module Hanafuda (
     , Pack
     , add
     , cards
+    , cardsOfPack
     , contains
     , empty
     , flower