diff --git a/src/dev/Makefile.Vx b/src/dev/Makefile.Vx
index 4a8a14d34..df74d1624 100644
--- a/src/dev/Makefile.Vx
+++ b/src/dev/Makefile.Vx
@@ -90,7 +90,6 @@ SRCS.c += ../devSmAB1746HSTP1.c
 SRCS.c += ../devSoSoft.c
 SRCS.c += ../devSoSymb.c
 SRCS.c += ../devSoTestAsyn.c
-SRCS.c += ../devSysmon.c
 SRCS.c += ../devTimerMz8310.c
 SRCS.c += ../devVxiTDM.c
 #	SRCS.c += ../devWfCamac.c