diff --git a/src/class/cdc/cdc_device.h b/src/class/cdc/cdc_device.h
index 72e29705a..fbc7162a3 100644
--- a/src/class/cdc/cdc_device.h
+++ b/src/class/cdc/cdc_device.h
@@ -82,7 +82,7 @@ int32_t  tud_cdc_n_read_char       (uint8_t itf);
 void     tud_cdc_n_read_flush      (uint8_t itf);
 
 // Get a byte from FIFO at the specified position without removing it
-bool     tud_cdc_n_peek            (uint8_t itf, uint8_t* uv8);
+bool     tud_cdc_n_peek            (uint8_t itf, uint8_t* ui8);
 
 // Write bytes to TX FIFO, data may remain in the FIFO for a while
 uint32_t tud_cdc_n_write           (uint8_t itf, void const* buffer, uint32_t bufsize);
@@ -116,7 +116,7 @@ static inline uint32_t tud_cdc_available       (void);
 static inline int32_t  tud_cdc_read_char       (void);
 static inline uint32_t tud_cdc_read            (void* buffer, uint32_t bufsize);
 static inline void     tud_cdc_read_flush      (void);
-static inline bool     tud_cdc_peek            (uint8_t* u8);
+static inline bool     tud_cdc_peek            (uint8_t* ui8);
 
 static inline uint32_t tud_cdc_write_char      (char ch);
 static inline uint32_t tud_cdc_write           (void const* buffer, uint32_t bufsize);
@@ -206,9 +206,9 @@ static inline void tud_cdc_read_flush (void)
   tud_cdc_n_read_flush(0);
 }
 
-static inline bool tud_cdc_peek (uint8_t* uv8)
+static inline bool tud_cdc_peek (uint8_t* ui8)
 {
-  return tud_cdc_n_peek(0, uv8);
+  return tud_cdc_n_peek(0, ui8);
 }
 
 static inline uint32_t tud_cdc_write_char (char ch)