diff --git a/include/osmocom/ctrl/ports.h b/include/osmocom/ctrl/ports.h
index 6d15406..32a8910 100644
--- a/include/osmocom/ctrl/ports.h
+++ b/include/osmocom/ctrl/ports.h
@@ -2,6 +2,7 @@
 
 /* TCP port numbers used for CTRL interfaces in osmocom projects */
 
+#define OSMO_CTRL_PORT_BTS	4238
 #define OSMO_CTRL_PORT_NITB_BSC	4249
 #define OSMO_CTRL_PORT_BSC_NAT	4250
 #define OSMO_CTRL_PORT_SGSN	4251