diff --git a/src/class/vendor/vendor_device.h b/src/class/vendor/vendor_device.h
index 9abafda50..ca4837d7b 100644
--- a/src/class/vendor/vendor_device.h
+++ b/src/class/vendor/vendor_device.h
@@ -1,4 +1,4 @@
-/*
+/* 
  * The MIT License (MIT)
  *
  * Copyright (c) 2019 Ha Thach (tinyusb.org)
@@ -48,6 +48,7 @@ bool     tud_vendor_n_peek            (uint8_t itf, uint8_t* ui8);
 void     tud_vendor_n_read_flush      (uint8_t itf);
 
 uint32_t tud_vendor_n_write           (uint8_t itf, void const* buffer, uint32_t bufsize);
+uint32_t tud_vendor_n_write_flush     (uint8_t itf);
 uint32_t tud_vendor_n_write_available (uint8_t itf);
 
 static inline uint32_t tud_vendor_n_write_str (uint8_t itf, char const* str);
@@ -64,7 +65,7 @@ static inline void     tud_vendor_read_flush      (void);
 static inline uint32_t tud_vendor_write           (void const* buffer, uint32_t bufsize);
 static inline uint32_t tud_vendor_write_str       (char const* str);
 static inline uint32_t tud_vendor_write_available (void);
-static inline uint32_t tud_vendor_flush           (void);
+static inline uint32_t tud_vendor_write_flush     (void);
 
 //--------------------------------------------------------------------+
 // Application Callback API (weak is optional)
@@ -114,6 +115,11 @@ static inline uint32_t tud_vendor_write (void const* buffer, uint32_t bufsize)
   return tud_vendor_n_write(0, buffer, bufsize);
 }
 
+static inline uint32_t tud_vendor_write_flush (void)
+{
+  return tud_vendor_n_write_flush(0);
+}
+
 static inline uint32_t tud_vendor_write_str (char const* str)
 {
   return tud_vendor_n_write_str(0, str);
@@ -124,11 +130,6 @@ static inline uint32_t tud_vendor_write_available (void)
   return tud_vendor_n_write_available(0);
 }
 
-static inline uint32_t tud_vendor_flush (void)
-{
-  return tud_vendor_n_flush(0);
-}
-
 //--------------------------------------------------------------------+
 // Internal Class Driver API
 //--------------------------------------------------------------------+