diff --git a/internal/s3/client.go b/internal/s3/client.go
index c01d727..d6f4459 100644
--- a/internal/s3/client.go
+++ b/internal/s3/client.go
@@ -82,7 +82,7 @@ func (c *Client) Multipart(bucket, key string, objPartSize int, payload goja.Arr
 	    Key:    aws.String(key),
 	    Body:   payload.Bytes(),
 	    PartSize: objPartSize,
-	    Concurrency: currency
+	    Concurrency: concurrency
     })
     if err != nil {
 		stats.Report(c.vu, objPutFails, 1)