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diff --git a/scripts/training/phrase-extract/pcfg-extract/rule_extractor.h b/scripts/training/phrase-extract/pcfg-extract/rule_extractor.h
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+/***********************************************************************
+ Moses - statistical machine translation system
+ Copyright (C) 2006-2012 University of Edinburgh
+ 
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+ 
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+ 
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+***********************************************************************/
+
+#pragma once
+#ifndef PCFG_EXTRACT_RULE_EXTRACTOR_H_
+#define PCFG_EXTRACT_RULE_EXTRACTOR_H_
+
+#include "rule_collection.h"
+
+#include "pcfg-common/typedef.h"
+
+namespace Moses {
+namespace PCFG {
+
+class PcfgTree;
+
+// Extracts PCFG rules from syntax trees and adds them to a RuleCollection.
+class RuleExtractor {
+ public:
+  RuleExtractor(Vocabulary &);
+  void Extract(const PcfgTree &, RuleCollection &) const;
+ private:
+  Vocabulary &non_term_vocab_;
+};
+
+}  // namespace PCFG
+}  // namespace Moses
+
+#endif