diff --git a/demo/init/nonlin.dat.2d b/demo/init/nonlin.dat.2d
index 66bf1a8241ab5f9fe2e83ba0b51b285690c09666..aacae7dd5a812714fbb92416dfea846f69e1eece 100644
--- a/demo/init/nonlin.dat.2d
+++ b/demo/init/nonlin.dat.2d
@@ -29,5 +29,7 @@ nonlin->adapt[0]->refine bisections:  2
 
 nonlin->adapt->max iteration:         0
 
-nonlin->output->filename:       output/nonlin
+nonlin->output->filename:       output/nonlin.2d
 nonlin->output->ParaView format: 1
+nonlin->output->AMDiS format: 1
+nonlin->output->ARH format: 1