Index: head/usr.sbin/freebsd-update/freebsd-update.sh
===================================================================
--- head/usr.sbin/freebsd-update/freebsd-update.sh
+++ head/usr.sbin/freebsd-update/freebsd-update.sh
@@ -216,7 +216,15 @@
 # Add to the list of components which should be kept updated.
 config_Components () {
 	for C in $@; do
-		COMPONENTS="${COMPONENTS} ${C}"
+		if [ ! "$C" = "src" ]; then
+			COMPONENTS="${COMPONENTS} ${C}"
+		else
+			if [ "$(ls -A "/usr/src/")" ]; then
+				COMPONENTS="${COMPONENTS} ${C}"
+			else
+				echo "/usr/src/ is empty, skip src component"
+			fi
+		fi
 	done
 }