diff --git a/Makefile b/Makefile
index c74bac62d..383dbdeb9 100644
--- a/Makefile
+++ b/Makefile
@@ -198,11 +198,11 @@ build/datenspuren/schedule.html : content/static/datenspuren/fahrplan/index.de.h
 
 build/datenspuren/news-rss.xml : STYLE=xsl/rss.xsl
 build/datenspuren/news-rss.xml : NOVALID:=true
-build/datenspuren/news-rss.xml : PFLAGS+=--stringparam prefix ds09-
+build/datenspuren/news-rss.xml : PFLAGS+=--stringparam prefix ds11-
 build/datenspuren/news-rss.xml : VFLAGS_OUT=$(VFLAGS) --schema xsd/rss20.xsd
 build/datenspuren/news-atom.xml : STYLE=xsl/atom.xsl
 build/datenspuren/news-atom.xml : NOVALID:=true
-build/datenspuren/news-atom.xml : PFLAGS+=--stringparam prefix ds09-
+build/datenspuren/news-atom.xml : PFLAGS+=--stringparam prefix ds11-
 build/datenspuren/news-atom.xml : VFLAGS_OUT=$(VFLAGS) --relaxng xsd/atom.rng
 
 xhtml5-validate: $(patsubst build/%.html, build/%.html.xhtml5-validate, $(CONTENT))