diff --git a/usr.sbin/portsnap/portsnap/portsnap.sh b/usr.sbin/portsnap/portsnap/portsnap.sh
index 2b48385411f3..7ff1f6b4ae82 100644
--- a/usr.sbin/portsnap/portsnap/portsnap.sh
+++ b/usr.sbin/portsnap/portsnap/portsnap.sh
@@ -803,6 +803,11 @@ update_run() {
 		return 0
 	fi
 
+	if sort ${WORKDIR}/INDEX | cmp ${PORTSDIR}/.portsnap.INDEX -; then
+		echo "Ports tree is already up to date."
+		return 0
+	fi
+
 	echo -n "Removing old files and directories... "
 	sort ${WORKDIR}/INDEX | comm -23 ${PORTSDIR}/.portsnap.INDEX - |
 	    cut -f 1 -d '|' | lam -s "${PORTSDIR}/" - | xargs rm -rf