diff --git a/drivers/usbdev/pl2303.c b/drivers/usbdev/pl2303.c
index 566a3f1e2c0af..a36d39d053642 100644
--- a/drivers/usbdev/pl2303.c
+++ b/drivers/usbdev/pl2303.c
@@ -636,7 +636,7 @@ static int usbclass_sndpacket(FAR struct pl2303_dev_s *priv)
 
   /* Get the maximum number of bytes that will fit into one bulk IN request */
 
-  reqlen = MAX(CONFIG_PL2303_BULKIN_REQLEN, ep->maxpacket);
+  reqlen = MIN(CONFIG_PL2303_BULKIN_REQLEN, ep->maxpacket);
 
   while (!sq_empty(&priv->reqlist))
     {