  RXJ1713.7-3946 is a key object to check the supernova remnant paradigm of the
origin of Galactic cosmic rays. While the origin of its gamma-ray emission
(hadronic versus leptonic) is still debated, the hard spectrum at GeV energies
reported by the Fermi collaboration is generally interpreted as a strong
argument in favor of a leptonic scenario. On the contrary, we show that
hadronic interactions can naturally explain the gamma-ray spectrum if gas
clumps are present in the supernova remnant shell. The absence of thermal
X-rays from the remnant fits well within this scenario.
