diff --git a/openbsc/include/openbsc/control_cmd.h b/openbsc/include/openbsc/control_cmd.h
index c94c7b574..82252cb6a 100644
--- a/openbsc/include/openbsc/control_cmd.h
+++ b/openbsc/include/openbsc/control_cmd.h
@@ -148,4 +148,7 @@ struct ctrl_cmd_element cmd_##cmdname = { \
 	.verify = &verify_##cmdname, \
 }
 
+struct gsm_network;
+int controlif_setup(struct gsm_network *gsmnet, uint16_t port);
+
 #endif /* _CONTROL_CMD_H */