diff --git a/src/gsm/gsup.c b/src/gsm/gsup.c
index e3eef02..9c2f817 100644
--- a/src/gsm/gsup.c
+++ b/src/gsm/gsup.c
@@ -70,6 +70,14 @@
 	{ 0, NULL }
 };
 
+const struct value_string osmo_gsup_session_state_names[] = {
+	{ OSMO_GSUP_SESSION_STATE_NONE, "NONE" },
+	{ OSMO_GSUP_SESSION_STATE_BEGIN, "BEGIN" },
+	{ OSMO_GSUP_SESSION_STATE_CONTINUE, "CONTINUE" },
+	{ OSMO_GSUP_SESSION_STATE_END, "END" },
+	{ 0, NULL }
+};
+
 
 /*! return the error message type corresponding to \a type_in
  *  \returns matching error message type; -1 on error */
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index f98f7c9..4d9811b 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -469,6 +469,7 @@
 osmo_gsup_encode;
 osmo_gsup_decode;
 osmo_gsup_message_type_names;
+osmo_gsup_session_state_names;
 osmo_gsup_get_err_msg_type;
 
 osmo_oap_encode;