diff --git a/src/jsx_encoder.erl b/src/jsx_encoder.erl
index 35c0af2..f6c0c2f 100644
--- a/src/jsx_encoder.erl
+++ b/src/jsx_encoder.erl
@@ -24,6 +24,7 @@
 -module(jsx_encoder).
 
 -export([encoder/3]).
+-compile(export_all).
 
 -spec encoder(Handler::module(), State::any(), Opts::jsx:opts()) -> jsx:encoder().
 
@@ -118,8 +119,7 @@ check_string(<<C/utf8, Rest/binary>>) when C < 16#fdd0 ->
 check_string(<<C/utf8, Rest/binary>>) when C > 16#fdef, C < 16#fffe ->
     check_string(Rest);
 check_string(<<C/utf8, Rest/binary>>)
-        when C > 16#ffff andalso 
-            C =/= 16#fffe andalso C =/= 16#ffff andalso
+        when C > 16#ffff andalso
             C =/= 16#1fffe andalso C =/= 16#1ffff andalso
             C =/= 16#2fffe andalso C =/= 16#2ffff andalso
             C =/= 16#3fffe andalso C =/= 16#3ffff andalso