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diff --git a/audio/decoders/xa.h b/audio/decoders/xa.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program 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 General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+/**
+ * @file
+ * Sound decoder used in engines:
+ * - sword1 (PSX port of the game)
+ * - sword2 (PSX port of the game)
+ * - tinsel (PSX port of the game)
+ */
+
+#ifndef AUDIO_DECODERS_XA_H
+#define AUDIO_DECODERS_XA_H
+
+#include "common/types.h"
+
+namespace Common {
+class SeekableReadStream;
+}
+
+namespace Audio {
+
+class RewindableAudioStream;
+
+/**
+ * Takes an input stream containing XA ADPCM sound data and creates
+ * an RewindableAudioStream from that.
+ *
+ * @param stream            the SeekableReadStream from which to read the XA ADPCM data
+ * @param rate              the sampling rate
+ * @param disposeAfterUse   whether to delete the stream after use.
+ * @return   a new RewindableAudioStream, or NULL, if an error occurred
+ */
+RewindableAudioStream *makeXAStream(
+	Common::SeekableReadStream *stream,
+	int rate,
+	DisposeAfterUse::Flag disposeAfterUse = DisposeAfterUse::YES);
+
+} // End of namespace Audio
+
+#endif