diff --git a/Makefile b/Makefile
index c2872ec6c..e204db8ea 100644
--- a/Makefile
+++ b/Makefile
@@ -55,10 +55,11 @@ CLEAN=$(CONTENT) $(NEWSFILES) $(WWW_CCC_DE_UPDATES) $(DS_PAGES)
 
 NOVALID_IGNORE:=false
 
-define xml_to_html
+define xml_process
 	$(VALIDATOR) $(VFLAGS) $<
 	$(PROCESSOR) $(PFLAGS) -o $@ $(STYLE) $<
-	$(VALIDATOR) $(VFLAGS) $@ || $(NOVALID_IGNORE) || { rm $@ ; exit 1 ; }
+	$(VALIDATOR) $(VFLAGS) $@ || $(NOVALID_IGNORE) || \
+		{ touch -m -t 197001010000 Makefile $@ ; exit 1 ; }
 endef
 
 
@@ -83,25 +84,25 @@ news.xml: $(NEWSITEMS)
 	sh scripts/gen_news.xml.sh $^ > $@
 
 $(NEWSFILES): news.xml $(NAVIGATION) $(STYLE)
-	$(call xml_to_html)
+	$(call xml_process)
 
 build/%.html: content/pages/%.xml $(STYLE) $(NAVIGATION) $(WWW_CCC_DE_UPDATES)
-	$(call xml_to_html)
+	$(call xml_process)
 
 build/news/%.html : BASEURL="../"
 build/news/%.html: content/news/%.xml $(STYLE) $(NAVIGATION) $(WWW_CCC_DE_UPDATES)
-	$(call xml_to_html)
+	$(call xml_process)
 
 build/cgi-bin/search.html : BASEURL="../"
 build/cgi-bin/search.html: content/cgi-bin/search.xml $(STYLE) $(NAVIGATION)
-	$(call xml_to_html)
+	$(call xml_process)
 
 # -- MNE-20060421: Lt. Astro geht Validierung noch nicht mit dem Fahrplan,
 #                  daher fuer Datenspuren auskommentiert
 build/datenspuren/%html : STYLE=$(DS_STYLE)
 build/datenspuren/%html : NOVALID_IGNORE=true
 build/datenspuren/%.html: content/datenspuren/%.xml $(DS_STYLE)
-	$(call xml_to_html)
+	$(call xml_process)
 
 content/datenspuren/schedule.xml: content/static/datenspuren/fahrplan/days.de.html
 	cp $< $@