diff --git a/CONTRIBUTORS.rst b/CONTRIBUTORS.rst
index 085f8082a..451ac0783 100644
--- a/CONTRIBUTORS.rst
+++ b/CONTRIBUTORS.rst
@@ -31,6 +31,13 @@ Notable contributors
 -  Most features development
 
 
+`Heiko Kuester <https://github.com/IngHK>`__
+--------------------------------------------
+
+-  Add CH34x and PL2303 support (CDC host)
+-  Improve FTDI and CP210x support (CDC host)
+
+
 `Hristo Gochkov <https://github.com/me-no-dev>`__
 -------------------------------------------------
 
diff --git a/README.rst b/README.rst
index fe2417451..6922c231e 100644
--- a/README.rst
+++ b/README.rst
@@ -77,7 +77,7 @@ Host Stack
 - Human Interface Device (HID): Keyboard, Mouse, Generic
 - Mass Storage Class (MSC)
 - Communication Device Class: CDC-ACM
-- Vendor serial over USB: FTDI, CP210x
+- Vendor serial over USB: FTDI, CP210x, CH34x, PL2303
 - Hub with multiple-level support
 
 Similar to the Device Stack, if you have a special requirement, `usbh_app_driver_get_cb()` can be used to write your own class driver without modifying the stack.
diff --git a/src/class/cdc/cdc_host.c b/src/class/cdc/cdc_host.c
index 429d0a113..b35a8fd93 100644
--- a/src/class/cdc/cdc_host.c
+++ b/src/class/cdc/cdc_host.c
@@ -24,7 +24,7 @@
  * This file is part of the TinyUSB stack.
  *
  * Contribution
- * - Heiko Kuester: CH34x support
+ * - Heiko Kuester: add support of CH34x & PL2303, improve support of FTDI & CP210x
  */
 
 #include "tusb_option.h"
@@ -818,12 +818,12 @@ bool cdch_set_config(uint8_t daddr, uint8_t itf_num) {
   TU_ASSERT(p_cdc && p_cdc->serial_drid < SERIAL_DRIVER_COUNT);
   TU_LOG_P_CDC("set config");
 
-  // fake transfer to kick-off process
+  // fake transfer to kick-off process_set_config()
   tuh_xfer_t xfer;
   xfer.daddr  = daddr;
   xfer.result = XFER_RESULT_SUCCESS;
   xfer.setup  = &request;
-  xfer.user_data = 0; // initial state
+  xfer.user_data = 0; // initial state 0
 
   serial_drivers[p_cdc->serial_drid].process_set_config(&xfer);
   return true;