diff --git a/c_src/decoder.c b/c_src/decoder.c
index 12debb6..d5f0822 100644
--- a/c_src/decoder.c
+++ b/c_src/decoder.c
@@ -65,6 +65,20 @@ typedef struct {
     int             st_top;
 } Decoder;
 
+Decoder* dec_new(ErlNifEnv* env);
+void dec_init(Decoder* d, ErlNifEnv* env, ERL_NIF_TERM arg, ErlNifBinary* bin);
+ERL_NIF_TERM dec_error(Decoder* d, const char* atom);
+char dec_curr(Decoder* d);
+int dec_top(Decoder* d);
+void dec_push(Decoder* d, char val);
+void dec_pop(Decoder* d, char val);
+int dec_string(Decoder* d, ERL_NIF_TERM* value);
+int dec_number(Decoder* d, ERL_NIF_TERM* value);
+ERL_NIF_TERM make_empty_object(ErlNifEnv* env, int ret_map);
+int make_object(ErlNifEnv* env, ERL_NIF_TERM pairs, ERL_NIF_TERM* out, int ret_map);
+ERL_NIF_TERM make_array(ErlNifEnv* env, ERL_NIF_TERM list);
+
+
 Decoder*
 dec_new(ErlNifEnv* env)
 {
diff --git a/c_src/encoder.c b/c_src/encoder.c
index 4a96048..33d619c 100644
--- a/c_src/encoder.c
+++ b/c_src/encoder.c
@@ -67,6 +67,16 @@ static char* shifts[NUM_SHIFTS] = {
 };
 
 
+Encoder* enc_new(ErlNifEnv* env);
+int enc_init(Encoder* e, ErlNifEnv* env);
+ERL_NIF_TERM enc_error(Encoder* e, const char* msg);
+ERL_NIF_TERM enc_obj_error(Encoder* e, const char* msg, ERL_NIF_TERM obj);
+int enc_result(Encoder* e, ERL_NIF_TERM* value);
+int enc_done(Encoder* e, ERL_NIF_TERM* value);
+#if MAP_TYPE_PRESENT
+int enc_map_to_ejson(ErlNifEnv* env, ERL_NIF_TERM map, ERL_NIF_TERM* out);
+#endif
+
 Encoder*
 enc_new(ErlNifEnv* env)
 {