diff --git a/scripts/target/mame/arcade.lua b/scripts/target/mame/arcade.lua
index d5879704270..5df3b895e2e 100644
--- a/scripts/target/mame/arcade.lua
+++ b/scripts/target/mame/arcade.lua
@@ -569,7 +569,7 @@ MACHINES["X76F041"] = true
 MACHINES["X76F100"] = true
 MACHINES["Z80CTC"] = true
 MACHINES["Z80DART"] = true
---MACHINES["Z80SIO"] = true
+MACHINES["Z80SIO"] = true
 MACHINES["Z80SCC"] = true
 MACHINES["Z80DMA"] = true
 MACHINES["Z80PIO"] = true