--- a/maps/Makefile	Sat Feb 07 06:39:20 2015 +0200
+++ b/maps/Makefile	Sat Feb 07 08:21:04 2015 +0200
@@ -10,7 +10,7 @@
 	$(addsuffix .png,$(MAPLIST))
 
 all:
-	@echo "Usage: make <maps|fetch|diff|upload>"
+	@echo "Usage: make <maps|fetch|diff|upload|clean>"
 	@echo
 	@echo "maps  : Build HTML, HTML+JS, PNG image and ANSI format maps."
 	@echo "fetch : Fetch latest raw ASCII map data from bat.org."
@@ -19,6 +19,8 @@
 	@echo "        A diff -u of new and old location files is outputted."
 	@echo "upload: Uploads map and loc-files via SCP to server specified in"
 	@echo "        ../config.mak"
+	@echo "clean : Delete all the generated files."
+	@echo
 
 
 maps: $(addsuffix .ppm,$(MAPLIST)) $(TARGETS)