diff --git a/src/cpp/ripple/OrderBookDB.cpp b/src/cpp/ripple/OrderBookDB.cpp
index 9bfcd25ed8..0a7be27834 100644
--- a/src/cpp/ripple/OrderBookDB.cpp
+++ b/src/cpp/ripple/OrderBookDB.cpp
@@ -55,10 +55,8 @@ void OrderBookDB::setup(Ledger::ref ledger)
 				OrderBook::pointer book = boost::make_shared<OrderBook>(boost::cref(index),
 					boost::cref(ci), boost::cref(co), boost::cref(ii), boost::cref(io));
 
-				mSourceMap[currencyIssuer_ct(boost::reference_wrapper<const uint160>(ci),
-					boost::reference_wrapper<const uint160>(ii))].push_back(book);
-				mDestMap[currencyIssuer_ct(boost::reference_wrapper<const uint160>(co),
-					boost::reference_wrapper<const uint160>(io))].push_back(book);
+				mSourceMap[currencyIssuer_ct(ci, ii)].push_back(book);
+				mDestMap[currencyIssuer_ct(co, io)].push_back(book);
 			}
 		}
 
diff --git a/src/cpp/ripple/OrderBookDB.h b/src/cpp/ripple/OrderBookDB.h
index e90f377685..f7dbd0fa84 100644
--- a/src/cpp/ripple/OrderBookDB.h
+++ b/src/cpp/ripple/OrderBookDB.h
@@ -16,7 +16,12 @@
 //
 
 typedef std::pair<uint160, uint160> currencyIssuer_t;
+
+#ifdef C11X
 typedef std::pair<const uint160&, const uint160&> currencyIssuer_ct;
+#else
+typedef std::pair<uint160, uint160> currencyIssuer_ct; // C++ defect 106
+#endif
 
 class BookListeners
 {