diff --git a/src/encoding.h b/src/encoding.h
index ff62bc9..6764ce4 100644
--- a/src/encoding.h
+++ b/src/encoding.h
@@ -68,4 +68,12 @@
 			uint8_t *identity, uint8_t chan_needed);
 
 	static unsigned write_packet_paging_request(bitvec * dest);
+
+	static int rlc_write_dl_data_header(
+			const struct gprs_rlc_data_info *rlc,
+			uint8_t *data);
+	static unsigned int rlc_copy_from_aligned_buffer(
+			const struct gprs_rlc_data_info *rlc,
+			unsigned int data_block_idx,
+			uint8_t *dst, const uint8_t *buffer);
 };