1 files changed, 4 insertions, 0 deletions
diff --git a/decoder/ff_lm.cc b/decoder/ff_lm.cc
index 9e6f02b7..0590fa7e 100644
--- a/decoder/ff_lm.cc
+++ b/decoder/ff_lm.cc
@@ -532,6 +532,10 @@ LanguageModel::LanguageModel(const string& param) {
   SetStateSize(LanguageModelImpl::OrderToStateSize(order));
 }
 
+FeatureFunction::Features LanguageModel::features() const {
+  return single_feature(fid_);
+}
+
 LanguageModel::~LanguageModel() {
   delete pimpl_;
 }