diff --git a/lib/chess/moves/king.ex b/lib/chess/moves/king.ex
index a556235..4f9ab9f 100644
--- a/lib/chess/moves/king.ex
+++ b/lib/chess/moves/king.ex
@@ -2,7 +2,7 @@ defmodule Chess.Moves.King do
   @moduledoc false
 
   def moves(_board, {file, rank}) do
-    patterns
+    patterns()
     |> Enum.map(fn ({fv, rv}) -> {file + fv, rank + rv} end)
     |> Enum.reject(fn ({file, rank}) ->
       file < 0 || rank < 0 || file > 7 || rank > 7
diff --git a/lib/chess/moves/knight.ex b/lib/chess/moves/knight.ex
index 51ffe1d..e976fdf 100644
--- a/lib/chess/moves/knight.ex
+++ b/lib/chess/moves/knight.ex
@@ -2,7 +2,7 @@ defmodule Chess.Moves.Knight do
   @moduledoc false
 
   def moves(_board, {file, rank}) do
-    patterns
+    patterns()
     |> Enum.map(fn ({fv, rv}) -> {file + fv, rank + rv} end)
     |> Enum.reject(fn ({file, rank}) ->
       file < 0 || rank < 0 || file > 7 || rank > 7