diff --git a/avr/common/ringbuffer_y.asm b/avr/common/ringbuffer_y.asm
index 7eba828..e4e2ec9 100644
--- a/avr/common/ringbuffer_y.asm
+++ b/avr/common/ringbuffer_y.asm
@@ -119,7 +119,7 @@ RingBufferY_Reset:
 ; @routine RingBufferY_ReadByteGuarded
 ;
 ; @return CFLAG on success, cleared on error
-; @param r16 byte to write
+; @return r16 byte read
 ; @param Y pointer to start of interface data
 ; @clobbers R17, R18, X