diff --git a/src/mame/mess.flt b/src/mame/mess.flt
index 3832a298ddf..36ace1fa0c0 100644
--- a/src/mame/mess.flt
+++ b/src/mame/mess.flt
@@ -287,6 +287,7 @@ eurocom2.cpp
 europc.cpp
 eva.cpp
 evmbug.cpp
+ews4800.cpp
 excali64.cpp
 exelv.cpp
 exorciser.cpp