diff --git a/src/Amount.cpp b/src/Amount.cpp
index eb65164ba0..6c19711d3d 100644
--- a/src/Amount.cpp
+++ b/src/Amount.cpp
@@ -721,9 +721,9 @@ uint64 getRate(const STAmount& offerOut, const STAmount& offerIn)
 	if (offerOut.isZero()) throw std::runtime_error("Worthless offer");
 
 	STAmount r = divide(offerIn, offerOut, uint160(1));
-	assert((r.getOffset() >= -100) && (r.getOffset() <= 155));
-	uint64 ret = r.getOffset() + 100;
-	return (ret << (64 - 8)) | r.getValue();
+	assert((r.getExponent() >= -100) && (r.getExponent() <= 155));
+	uint64 ret = r.getExponent() + 100;
+	return (ret << (64 - 8)) | r.getMantissa();
 }
 
 STAmount getClaimed(STAmount& offerOut, STAmount& offerIn, STAmount& paid)
@@ -786,8 +786,7 @@ static uint64_t muldiv(uint64_t a, uint64_t b, uint64_t c)
 
 uint64 convertToDisplayAmount(const STAmount& internalAmount, uint64_t totalNow, uint64_t totalInit)
 { // Convert an internal ledger/account quantity of native currency to a display amount
-	if (internalAmount.isNative()) throw std::runtime_error("not native curency");
-	return muldiv(internalAmount.getValue(), totalInit, totalNow);
+	return muldiv(internalAmount.getNValue(), totalInit, totalNow);
 }
 
 STAmount convertToInternalAmount(uint64_t displayAmount, uint64_t totalNow, uint64_t totalInit,
diff --git a/src/SerializedTransaction.cpp b/src/SerializedTransaction.cpp
index ebdf54d7d4..81f463e343 100644
--- a/src/SerializedTransaction.cpp
+++ b/src/SerializedTransaction.cpp
@@ -164,14 +164,14 @@ STAmount SerializedTransaction::getTransactionFee() const
 {
 	const STAmount* v = dynamic_cast<const STAmount*>(mMiddleTxn.peekAtPIndex(TransactionIFee));
 	if (!v) throw std::runtime_error("corrupt transaction");
-	return v->getValue();
+	return v->getNValue();
 }
 
 void SerializedTransaction::setTransactionFee(STAmount saFee)
 {
 	STAmount* v = dynamic_cast<STAmount*>(mMiddleTxn.getPIndex(TransactionIFee));
 	if (!v) throw std::runtime_error("corrupt transaction");
-	v->setValue(saFee);
+	v->setNValue(saFee);
 }
 
 uint32 SerializedTransaction::getSequence() const
diff --git a/src/SerializedTypes.h b/src/SerializedTypes.h
index 59aa59ca1c..317ff0312d 100644
--- a/src/SerializedTypes.h
+++ b/src/SerializedTypes.h
@@ -253,9 +253,12 @@ public:
 	std::string getRaw() const;
 	void add(Serializer& s) const;
 
-	int getOffset() const				{ return mOffset; }
-	uint64 getValue() const				{ return mValue; }
-	void setValue(const STAmount& v)	{ mValue=v; }
+	int getExponent() const				{ return mOffset; }
+	uint64 getMantissa() const			{ return mValue; }
+
+	uint64 getNValue() const			{ if (!mIsNative) throw std::runtime_error("not native"); return mValue; }
+	void setNValue(uint64_t v)			{ if (!mIsNative) throw std::runtime_error("not native"); mValue = v; }
+
 	std::string getCurrencyHuman();
 
 	bool isNative() const		{ return mIsNative; }