diff --git a/include/btstack/sdp_util.h b/include/btstack/sdp_util.h
index fb91038f2..36bc9da7a 100644
--- a/include/btstack/sdp_util.h
+++ b/include/btstack/sdp_util.h
@@ -91,7 +91,9 @@ void de_dump_data_element(uint8_t * record);
 int de_get_len(uint8_t *header);
 de_size_t de_get_size_type(uint8_t *header);
 de_type_t de_get_element_type(uint8_t *header);
+int de_get_header_size(uint8_t * header);
 void de_create_sequence(uint8_t *header);
+void de_store_descriptor_with_len(uint8_t * header, de_type_t type, de_size_t size, uint32_t len);
 uint8_t * de_push_sequence(uint8_t *header);
 void de_pop_sequence(uint8_t * parent, uint8_t * child);
 void de_add_number(uint8_t *seq, de_type_t type, de_size_t size, uint32_t value);