diff --git a/src/mame/mess.flt b/src/mame/mess.flt
index 1ed87ed6f2d..47baaf62f60 100644
--- a/src/mame/mess.flt
+++ b/src/mame/mess.flt
@@ -594,6 +594,7 @@ sbc6510.cpp
 sbrain.cpp
 sc1.cpp
 sc2.cpp
+scopus.cpp
 scorpion.cpp
 scv.cpp
 sdk80.cpp