diff --git a/scripts/target/mame/arcade.lua b/scripts/target/mame/arcade.lua
index 78fa16fd0dc..a4f7a27b332 100644
--- a/scripts/target/mame/arcade.lua
+++ b/scripts/target/mame/arcade.lua
@@ -602,7 +602,7 @@ MACHINES["GENPC"] = true
 MACHINES["GEN_LATCH"] = true
 MACHINES["WATCHDOG"] = true
 MACHINES["INPUT_MERGER"] = true
-MACHINES["k054321"] = true
+MACHINES["K054321"] = true
 
 --------------------------------------------------
 -- specify available bus cores
diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index 2bd722ea41d..0bcd50dcc58 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -604,7 +604,7 @@ MACHINES["SONY_DRIVE"] = true
 MACHINES["SCNXX562"] = true
 MACHINES["FGA002"] = true
 MACHINES["INPUT_MERGER"] = true
--- MACHINES["k054321"] = true
+-- MACHINES["K054321"] = true
 
 --------------------------------------------------
 -- specify available bus cores