diff --git a/indra/libhacd/hacdHACD.h b/indra/libhacd/hacdHACD.h
index bdbbc472b..0c9f11653 100644
--- a/indra/libhacd/hacdHACD.h
+++ b/indra/libhacd/hacdHACD.h
@@ -76,6 +76,7 @@ namespace HACD
     {
     public:
 		virtual void operator()( char const *aMsg, double aProgress, double aConcavity, size_t aVertices) = 0;
+		virtual ~ICallback() {}
     };
 	
 	typedef ICallback* CallBackFunction;
diff --git a/indra/llcommon/sguuidhash.h b/indra/llcommon/sguuidhash.h
new file mode 100644
index 000000000..b6b65aa0a
--- /dev/null
+++ b/indra/llcommon/sguuidhash.h
@@ -0,0 +1,36 @@
+/* Copyright (C) 2013 Siana Gearz
+ *
+ * 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 */
+
+#ifndef SGUUIDHASH_H
+#define SGUUIDHASH_H
+
+#include "lluuid.h"
+#include <boost/functional/hash.hpp>
+#include <boost/unordered_map.hpp>
+
+namespace boost {
+    template<> class hash<LLUUID> {
+    public:
+        size_t operator()(const LLUUID& id ) const
+        {
+            return *reinterpret_cast<const size_t*>(id.mData);
+        }
+    };
+}
+
+
+#endif