diff --git a/lib/jason.ex b/lib/jason.ex
index 43bda03..b6a685c 100644
--- a/lib/jason.ex
+++ b/lib/jason.ex
@@ -207,7 +207,7 @@ defmodule Jason do
     end
   end
 
-  defp do_encode(input, %{pretty: pretty} = opts) do
+  defp do_encode(input, %{pretty: pretty} = opts) when pretty !== false do
     case Encode.encode(input, opts) do
       {:ok, encoded} -> {:ok, Formatter.pretty_print_to_iodata(encoded, pretty)}
       other -> other
diff --git a/test/encode_test.exs b/test/encode_test.exs
index 0533729..805085e 100644
--- a/test/encode_test.exs
+++ b/test/encode_test.exs
@@ -155,6 +155,10 @@ defmodule Jason.EncoderTest do
     assert to_json(%{a: 3.14159, b: 1}, pretty: true) == ~s|{\n  "a": 3.14159,\n  "b": 1\n}|
   end
 
+  test "pretty: false" do
+    assert to_json(%{a: 3.14159, b: 1}, pretty: false) == ~s|{"a":3.14159,"b":1}|
+  end
+
   defp to_json(value, opts \\ []) do
     Jason.encode!(value, opts)
   end