diff --git a/openbsc/src/libmsc/db.c b/openbsc/src/libmsc/db.c
index 126ce66..a7eeda4 100644
--- a/openbsc/src/libmsc/db.c
+++ b/openbsc/src/libmsc/db.c
@@ -221,7 +221,7 @@
 }
 
 
-int db_prepare()
+int db_prepare(void)
 {
 	dbi_result result;
 	int i;
@@ -245,7 +245,7 @@
 	return 0;
 }
 
-int db_fini()
+int db_fini(void)
 {
 	dbi_conn_close(conn);
 	dbi_shutdown();