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diff --git a/indra/newview/llhasheduniqueid.h b/indra/newview/llhasheduniqueid.h
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+++ b/indra/newview/llhasheduniqueid.h
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+/** 
+ * @file llhasheduniqueid.h
+ * @brief retrieves obfuscated but unique id for the system
+ *
+ * $LicenseInfo:firstyear=2013&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2013, Linden Research, Inc.
+ * 
+ * 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;
+ * version 2.1 of the License only.
+ * 
+ * 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
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+#ifndef LL_LLHASHEDUNIQUEID_H
+#define LL_LLHASHEDUNIQUEID_H
+#include "llmd5.h"
+
+/// Get an obfuscated identifier for this system 
+bool llHashedUniqueID(unsigned char id[MD5HEX_STR_SIZE]);
+///< @returns true if the id is considered valid (if false, the id is all zeros)
+
+#endif // LL_LLHASHEDUNIQUEID_H