diff --git a/src/cpp/ripple/OrderBook.cpp b/src/cpp/ripple/OrderBook.cpp
index 2cf716257e..d140c8ce7d 100644
--- a/src/cpp/ripple/OrderBook.cpp
+++ b/src/cpp/ripple/OrderBook.cpp
@@ -13,11 +13,11 @@ OrderBook::OrderBook(SerializedLedgerEntry::pointer ledgerEntry)
 	const STAmount	saTakerGets	= ledgerEntry->getFieldAmount(sfTakerGets);
 	const STAmount	saTakerPays	= ledgerEntry->getFieldAmount(sfTakerPays);
 
-	mCurrencyIn		= saTakerGets.getCurrency();
-	mCurrencyOut	= saTakerPays.getCurrency();
-	mIssuerIn		= saTakerGets.getIssuer();
-	mIssuerOut		= saTakerPays.getIssuer();
+	mCurrencyIn		= saTakerPays.getCurrency();
+	mCurrencyOut	= saTakerGets.getCurrency();
+	mIssuerIn		= saTakerPays.getIssuer();
+	mIssuerOut		= saTakerGets.getIssuer();
 
-	mBookBase=Ledger::getBookBase(mCurrencyOut,mIssuerOut,mCurrencyIn,mIssuerIn);
+	mBookBase=Ledger::getBookBase(mCurrencyIn, mIssuerIn, mCurrencyOut, mIssuerOut);
 }
 // vim:ts=4