1 files changed, 2 insertions, 1 deletions
diff --git a/decoder/ff_fsa.h b/decoder/ff_fsa.h
index 2ffd6ef8..0b60ff81 100755
--- a/decoder/ff_fsa.h
+++ b/decoder/ff_fsa.h
@@ -32,7 +32,8 @@ struct FsaFeatureFunction {
 
 // regular bottom up scorer from Fsa feature
 template <class Impl>
-struct FeatureFunctionFromFsa {
+struct FeatureFunctionFromFsa : public FeatureFunction,Impl {
+  FeatureFunctionFromFsa(
 };