diff --git a/mxqsub.c b/mxqsub.c
index 802d13b2..7a870587 100644
--- a/mxqsub.c
+++ b/mxqsub.c
@@ -560,7 +560,7 @@ static int add_job(struct mx_mysql *mysql, struct mxq_job *j)
 
     j->job_id = insert_id;
 
-    res = mx_mysql_statement_close(&stmt);
+    mx_mysql_statement_close(&stmt);
 
     return (int)num_rows;
 }