diff --git a/openbsc/src/Makefile.am b/openbsc/src/Makefile.am
index ac41870..25d34ac 100644
--- a/openbsc/src/Makefile.am
+++ b/openbsc/src/Makefile.am
@@ -51,7 +51,7 @@
 
 ipaccess_proxy_SOURCES = ipaccess/ipaccess-proxy.c debug.c
 
-osmo_gb_proxy_SOURCES = gb_proxy.c gb_proxy_main.c \
+osmo_gb_proxy_SOURCES = gb_proxy.c gb_proxy_main.c gb_proxy_vty.c \
 			gprs_ns.c \
 			socket.c debug.c telnet_interface.c vty_interface_cmds.c 
 osmo_gb_proxy_LDADD = libvty.a