diff --git a/include/osmocom/ctrl/ports.h b/include/osmocom/ctrl/ports.h
index 101b894..d28066e 100644
--- a/include/osmocom/ctrl/ports.h
+++ b/include/osmocom/ctrl/ports.h
@@ -13,7 +13,7 @@
 #define OSMO_CTRL_PORT_BSC_NAT	4250
 #define OSMO_CTRL_PORT_SGSN	4251
 /* 4252-4254 used by VTY interface */
-#define OSMO_CTRL_PORT_CSCN	4255
+#define OSMO_CTRL_PORT_MSC	4255
 /* 4256 used by VTY interface */
 #define OSMO_CTRL_PORT_GGSN	4257
 #define OSMO_CTRL_PORT_HLR	4259
diff --git a/include/osmocom/vty/ports.h b/include/osmocom/vty/ports.h
index 70dc69c..887e4df 100644
--- a/include/osmocom/vty/ports.h
+++ b/include/osmocom/vty/ports.h
@@ -20,7 +20,7 @@
 /* 4249-4251 used by control interface */
 #define OSMO_VTY_PORT_BTSMGR	4252
 #define OSMO_VTY_PORT_GTPHUB	4253
-#define OSMO_VTY_PORT_CSCN	4254
+#define OSMO_VTY_PORT_MSC	4254
 /* 4255 used by control interface */
 #define OSMO_VTY_PORT_MNCC_SIP	4256
 /* 4257 used by control interface */