diff --git a/include/openbsc/sgsn.h b/include/openbsc/sgsn.h
index 1ede2c9..1ed1583 100644
--- a/include/openbsc/sgsn.h
+++ b/include/openbsc/sgsn.h
@@ -140,8 +140,8 @@
 
 /* sgsn_vty.c */
 
-int sgsn_vty_init(void);
-int sgsn_parse_config(const char *config_file, struct sgsn_config *cfg);
+int sgsn_vty_init(struct sgsn_config *cfg);
+int sgsn_parse_config(const char *config_file);
 
 /* sgsn.c */