diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 834e5d6..1e2d323 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -92,6 +92,8 @@
 gsm0808_create_sapi_reject;
 gsm0808_prepend_dtap_header;
 
+gsm0858_rsl_ul_meas_enc;
+
 gsm338_get_sms_alphabet;
 
 gsm340_gen_oa;