diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 518a5aa..2ba0c42 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -146,6 +146,8 @@
 gsm0808_dec_speech_codec;
 gsm0808_enc_speech_codec_list;
 gsm0808_dec_speech_codec_list;
+gsm0808_enc_channel_type;
+gsm0808_dec_channel_type;
 
 gsm0858_rsl_ul_meas_enc;