1 files changed, 7 insertions, 0 deletions
diff --git a/vowpalwabbit/oaa.cc b/vowpalwabbit/oaa.cc
index 2328b00d..03a7cac6 100644
--- a/vowpalwabbit/oaa.cc
+++ b/vowpalwabbit/oaa.cc
@@ -64,6 +64,13 @@ namespace OAA {
 
   LEARNER::base_learner* setup(vw& all, po::variables_map& vm)
   {
+    po::options_description opts("One-against-all options");
+    opts.add_options()
+      ("oaa", po::value<size_t>(), "Use one-against-all multiclass learning with <k> labels");
+    vm = add_options(all, opts);
+    if(!vm.count("oaa"))
+      return NULL;
+    
     oaa& data = calloc_or_die<oaa>();
     data.k = vm["oaa"].as<size_t>();
     data.shouldOutput = all.raw_prediction > 0;