diff --git a/usb.c b/usb.c
index a57f73fc..d8c755d4 100644
--- a/usb.c
+++ b/usb.c
@@ -314,7 +314,7 @@ mt76u_fill_rx_sg(struct mt76_dev *dev, struct mt76_queue *q, struct urb *urb,
 	}
 
 	urb->num_sgs = max_t(int, i, urb->num_sgs);
-	urb->transfer_buffer_length = urb->num_sgs * q->buf_size,
+	urb->transfer_buffer_length = urb->num_sgs * q->buf_size;
 	sg_init_marker(urb->sg, urb->num_sgs);
 
 	return i ? : -ENOMEM;