diff --git a/scripts/target/mame/mess.lua b/scripts/target/mame/mess.lua
index 3e78567bd13..295764be33a 100644
--- a/scripts/target/mame/mess.lua
+++ b/scripts/target/mame/mess.lua
@@ -442,6 +442,7 @@ MACHINES["I8255"] = true
 MACHINES["I8257"] = true
 MACHINES["I8271"] = true
 MACHINES["I8279"] = true
+MACHINES["I8291A"] = true
 MACHINES["I8355"] = true
 MACHINES["IDE"] = true
 MACHINES["IE15"] = true