diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c
index f7559b01a8479a29b0e264040c6987c81a2c810c..b11edb96f881598b9d525b3246976ba843a84d5c 100644
--- a/libraries/libmdb/mdb.c
+++ b/libraries/libmdb/mdb.c
@@ -5586,7 +5586,7 @@ mdb_cursor_txn(MDB_cursor *mc)
 MDB_dbi
 mdb_cursor_dbi(MDB_cursor *mc)
 {
-	if (!mc) return 0;
+	assert(mc != NULL);
 	return mc->mc_dbi;
 }