diff --git a/Grbl_Esp32/src/MacroBuffer.cpp b/Grbl_Esp32/src/MacroBuffer.cpp
index 34991128..e7d8fdb1 100644
--- a/Grbl_Esp32/src/MacroBuffer.cpp
+++ b/Grbl_Esp32/src/MacroBuffer.cpp
@@ -1,5 +1,5 @@
 /*
-  InputBuffer.cpp -  inputbuffer functions class
+  MacroBuffer.cpp -  for injecting macro data as an input stream
 
   Copyright (c) 2014 Luc Lebosse. All rights reserved.