diff --git a/src/mame/machine/awboard.cpp b/src/mame/machine/awboard.cpp
index bf72152a0e6..ddc49a3cfa0 100644
--- a/src/mame/machine/awboard.cpp
+++ b/src/mame/machine/awboard.cpp
@@ -25,7 +25,7 @@ Atomiswave ROM board specs from Cah4e3 @ http://cah4e3.wordpress.com/2009/07/26/
 
   Both low and high words of 32-bit offset from start of EPR-ROM area. Used for
   reading header and program code data, cannot be used for reading MPR-ROMs data.
-  During program code DMA transfer Romeo MCU perform data checksuming (in 8bit units),
+  During program code DMA transfer Romeo MCU perform data checksuming (decrypted data, in 8bit units),
   result must match some CPLD / encryption key-specific value, otherwise MPR-ROM access
   described below will not work correctly.
   Game header (first 256 bytes of ROM) is not checksum protected.