diff --git a/nostrdb/nostrdb.c b/nostrdb/nostrdb.c
index d48e79a5..b6d0f439 100644
--- a/nostrdb/nostrdb.c
+++ b/nostrdb/nostrdb.c
@@ -3155,7 +3155,7 @@ static int ndb_run_migrations(struct ndb *ndb)
 	return 1;
 }
 
-int ndb_init(struct ndb **pndb, const char *filename, struct ndb_config *config)
+int ndb_init(struct ndb **pndb, const char *filename, const struct ndb_config *config)
 {
 	struct ndb *ndb;
 	//MDB_dbi ind_id; // TODO: ind_pk, etc
diff --git a/nostrdb/nostrdb.h b/nostrdb/nostrdb.h
index a5f2833f..88cec55a 100644
--- a/nostrdb/nostrdb.h
+++ b/nostrdb/nostrdb.h
@@ -296,7 +296,7 @@ int ndb_decode_key(const char *secstr, struct ndb_keypair *keypair);
 int ndb_note_verify(void *secp_ctx, unsigned char pubkey[32], unsigned char id[32], unsigned char signature[64]);
 
 // NDB
-int ndb_init(struct ndb **ndb, const char *dbdir, struct ndb_config *);
+int ndb_init(struct ndb **ndb, const char *dbdir, const struct ndb_config *);
 int ndb_db_version(struct ndb *ndb);
 int ndb_process_event(struct ndb *, const char *json, int len);
 int ndb_process_events(struct ndb *, const char *ldjson, size_t len);