diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index 74bc1905dae..e9aa05c8078 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -2700,6 +2700,7 @@ createMESSProjects(_target, _subtarget, "motorola")
 files {
 	MAME_DIR .. "src/mame/drivers/m6805evs.cpp",
 	MAME_DIR .. "src/mame/drivers/m68705prg.cpp",
+	MAME_DIR .. "src/mame/drivers/mekd1.cpp",
 	MAME_DIR .. "src/mame/drivers/mekd2.cpp",
 	MAME_DIR .. "src/mame/drivers/mekd3.cpp",
 	MAME_DIR .. "src/mame/drivers/mekd4.cpp",