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-rw-r--r--openbsc/include/openbsc/gsm_data.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/openbsc/include/openbsc/gsm_data.h b/openbsc/include/openbsc/gsm_data.h
index 1fb80a2f3..ad6401e9c 100644
--- a/openbsc/include/openbsc/gsm_data.h
+++ b/openbsc/include/openbsc/gsm_data.h
@@ -388,7 +388,7 @@ enum gsm_e1_event {
void set_ts_e1link(struct gsm_bts_trx_ts *ts, u_int8_t e1_nr,
u_int8_t e1_ts, u_int8_t e1_ts_ss);
enum gsm_bts_type parse_btstype(char *arg);
-char *btstype2str(enum gsm_bts_type type);
+const char *btstype2str(enum gsm_bts_type type);
struct gsm_bts *gsm_bts_by_lac(struct gsm_network *net, unsigned int lac,
struct gsm_bts *start_bts);