diff --git a/src/riichi.erl b/src/riichi.erl
index f9f3738..f09b26b 100644
--- a/src/riichi.erl
+++ b/src/riichi.erl
@@ -50,21 +50,21 @@ nearest(Num, To) ->
     Num - (Num rem To) + To.
 
 
-score(_Fu, Yaku, Limit) when (Yaku >= 5) and (Limit == true) ->
+score(_Fu, Han, Limit) when (Han >= 5) and (Limit == true) ->
     if
-        Yaku < 6 ->
+        Han < 6 ->
             2000;
-        Yaku < 8 ->
+        Han < 8 ->
             3000;
-        Yaku < 11 ->
+        Han < 11 ->
             4000;
-        Yaku < 14 ->
+        Han < 14 ->
             6000;
         true ->
             8000
     end;
-score(Fu, Yaku, Limit) ->
-    Score = nearest(Fu * round(math:pow(2, 2 + Yaku)), 100),
+score(Fu, Han, Limit) ->
+    Score = nearest(Fu * round(math:pow(2, 2 + Han)), 100),
     if
         Limit and (Score > 2000) ->
             2000;
diff --git a/test/riichi_tests.erl b/test/riichi_tests.erl
index 147f693..21913df 100644
--- a/test/riichi_tests.erl
+++ b/test/riichi_tests.erl
@@ -60,8 +60,8 @@ nearest_test_() ->
     [?_assertEqual(riichi:nearest(Val, 10), 80) || Val <- lists:seq(71,80)].
 
 score_yaku_limit_test_() ->
-    [?_assertEqual(riichi:score(30, Yaku, true), Score)
-        || {Yaku, Score} <-
+    [?_assertEqual(riichi:score(30, Han, true), Score)
+        || {Han, Score} <-
             [
                 { 5, 2000},
                 { 6, 3000},