diff --git a/usr.sbin/etcupdate/etcupdate.sh b/usr.sbin/etcupdate/etcupdate.sh
index 1b6f0a10e5f1..bb12d3669126 100755
--- a/usr.sbin/etcupdate/etcupdate.sh
+++ b/usr.sbin/etcupdate/etcupdate.sh
@@ -184,7 +184,7 @@ build_tree()
 {
 	local destdir dir file make
 
-	make="make $MAKE_OPTIONS"
+	make="make $MAKE_OPTIONS -DNO_FILEMON"
 
 	log "Building tree at $1 with $make"
 	mkdir -p $1/usr/obj >&3 2>&1
diff --git a/usr.sbin/mergemaster/mergemaster.sh b/usr.sbin/mergemaster/mergemaster.sh
index 9bf4f9f67a01..8561503a6d19 100755
--- a/usr.sbin/mergemaster/mergemaster.sh
+++ b/usr.sbin/mergemaster/mergemaster.sh
@@ -486,7 +486,7 @@ fi
 SOURCEDIR=$(realpath "$SOURCEDIR")
 
 # Setup make to use system files from SOURCEDIR
-MM_MAKE="make ${ARCHSTRING} -m ${SOURCEDIR}/share/mk"
+MM_MAKE="make ${ARCHSTRING} -m ${SOURCEDIR}/share/mk -DNO_FILEMON"
 
 # Check DESTDIR against the mergemaster mtree database to see what
 # files the user changed from the reference files.