diff --git a/api/mraa/uart.hpp b/api/mraa/uart.hpp
index 0771fdc..571dec7 100644
--- a/api/mraa/uart.hpp
+++ b/api/mraa/uart.hpp
@@ -124,7 +124,7 @@ class Uart
     }
 
     /**
-     * Write bytes in String object to a device
+     * Write bytes in char* buffer to a device
      *
      * @param data buffer pointer
      * @param length maximum size of buffer