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-rw-r--r--decoder/ff_ngrams.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/decoder/ff_ngrams.h b/decoder/ff_ngrams.h
index 5dea9a7d..05b25974 100644
--- a/decoder/ff_ngrams.h
+++ b/decoder/ff_ngrams.h
@@ -7,7 +7,7 @@
#include "ff.h"
-struct NgramDetectorImpl;
+class NgramDetectorImpl;
class NgramDetector : public FeatureFunction {
public:
// param = "filename.lm [-o <order>] [-U <unigram-prefix>] [-B <bigram-prefix>] [-T <trigram-prefix>] [-4 <4-gram-prefix>] [-5 <5-gram-prefix>] [-S <separator>]