Import upstream version 0.9.13
diff --git a/include/openbsc/ussd.h b/include/openbsc/ussd.h
new file mode 100644
index 0000000..6f80d23
--- /dev/null
+++ b/include/openbsc/ussd.h
@@ -0,0 +1,10 @@
+#ifndef _USSD_H
+#define _USSD_H
+
+/* Handler function for mobile-originated USSD messages */
+
+#include <osmocore/msgb.h>
+
+int handle_rcv_ussd(struct gsm_subscriber_connection *conn, struct msgb *msg);
+
+#endif