camel-servlet feature doesn't work

Christian-Muellers-MacBook-Pro:bin cmueller$ ./karaf clean

karaf@root> features:addurl mvn:org.apache.camel.karaf/apache-camel/2.9.0/xml/features
karaf@root> features:install camel-servlet
Error executing command: Could not start bundle mvn:org.apache.camel/camel-servlet/2.9.0 in feature(s) camel-servlet-2.9.0: Unresolved constraint in bundle org.apache.camel.camel-servlet [80]: Unable to resolve 80.0: missing requirement [80.0] package; (&(package=org.osgi.service.http)(version>=1.2.0)(!(version>=2.0.0)))

We have to install the Karaf http feature first.