diff --git a/sqlx-core/src/mssql/transaction.rs b/sqlx-core/src/mssql/transaction.rs
index 953d73b6b0..2f557c94e7 100644
--- a/sqlx-core/src/mssql/transaction.rs
+++ b/sqlx-core/src/mssql/transaction.rs
@@ -16,7 +16,7 @@ impl TransactionManager for MssqlTransactionManager {
     type Database = Mssql;
     type Options = ();
 
-    fn begin_with(conn: &mut MssqlConnection, options: ()) -> BoxFuture<'_, Result<(), Error>> {
+    fn begin_with(conn: &mut MssqlConnection, _options: ()) -> BoxFuture<'_, Result<(), Error>> {
         Box::pin(async move {
             let depth = conn.stream.transaction_depth;