diff --git a/avr/modules/lcd/main.asm b/avr/modules/lcd/main.asm
index 174c9b5..4e89b9e 100644
--- a/avr/modules/lcd/main.asm
+++ b/avr/modules/lcd/main.asm
@@ -445,7 +445,7 @@ LCD_PrintChar_error:
 ;
 ; @return CFLAG set if okay, cleared on error
 ; @param  R16 byte to convert to hex
-; @clobbers r15, r16, r17, Z
+; @clobbers r15, r16, r17, r20, Z
 
 LCD_PrintHexByte:
   in r15, SREG
@@ -481,7 +481,7 @@ LCD_PrintHexByte_error:
 ; @return CFLAG set if okay, cleared on error
 ; @param  r18 low byte of the word
 ; @param  r19 high byte of the word
-; @clobbers r15, r16, r17, Z
+; @clobbers r15, r16, r17, r22, Z
 
 LCD_PrintHexWord:
   in r15, SREG