diff --git a/src/mame/machine/trs80m2kb.cpp b/src/mame/machine/trs80m2kb.cpp
index 1cefe9d5b3c..ada8391cf58 100644
--- a/src/mame/machine/trs80m2kb.cpp
+++ b/src/mame/machine/trs80m2kb.cpp
@@ -33,7 +33,7 @@ DEFINE_DEVICE_TYPE(TRS80M2_KEYBOARD, trs80m2_keyboard_device, "trs80m2kb", "TRS-
 
 ROM_START( trs80m2_keyboard )
 	ROM_REGION( 0x400, I8021_TAG, 0 )
-	ROM_LOAD( "65-1991.z4", 0x0000, 0x0400, NO_DUMP )
+	ROM_LOAD( "65-1991.z4", 0x0000, 0x0400, CRC(0a50e977) SHA1(c944cb9be062c9eed4f20a5b2568c8019dc71e27))
 ROM_END