diff --git a/src/internal.h b/src/internal.h
index aa2d4a1..6659599 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -35,4 +35,5 @@ long long read_bits(input_stream_t* state, int count, char signed_p);
 parse_result_t* do_parse(const parser_t* parser, parse_state_t *state);
 void put_cached(parse_state_t *ps, const parser_t *p, parse_result_t *cached);
 guint djbhash(const uint8_t *buf, size_t len);
+char* write_result_unamb(const parsed_token_t* tok);
 #endif // #ifndef HAMMER_INTERNAL__H