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diff --git a/engines/adl/adl_v3.h b/engines/adl/adl_v3.h
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+++ b/engines/adl/adl_v3.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.
+ *
+ */
+
+#ifndef ADL_ADL_V3_H
+#define ADL_ADL_V3_H
+
+#include "adl/adl_v2.h"
+
+// Note: this version of ADL redraws only when necessary, but
+// this is not currently implemented.
+
+namespace Common{
+class RandomSource;
+}
+
+namespace Adl {
+
+class AdlEngine_v3 : public AdlEngine_v2 {
+public:
+	virtual ~AdlEngine_v3() { }
+
+protected:
+	AdlEngine_v3(OSystem *syst, const AdlGameDescription *gd);
+
+	// AdlEngine
+	virtual void setupOpcodeTables();
+	virtual Common::String loadMessage(uint idx) const;
+
+	int o3_isVarGT(ScriptEnv &e);
+};
+
+} // End of namespace Adl
+
+#endif