diff --git a/src/ripple/app/transactors/Transactor.cpp b/src/ripple/app/transactors/Transactor.cpp
index 63330f786..1e4fee0c9 100644
--- a/src/ripple/app/transactors/Transactor.cpp
+++ b/src/ripple/app/transactors/Transactor.cpp
@@ -251,7 +251,7 @@ TER Transactor::preCheck ()
     if (!mTxn.isKnownGood ())
     {
         if (mTxn.isKnownBad () ||
-            (!(mParams & tapNO_CHECK_SIGN) && !mTxn.checkSign (mSigningPubKey)))
+            (!(mParams & tapNO_CHECK_SIGN) && !mTxn.checkSign()))
         {
             mTxn.setBad ();
             m_journal.warning << "apply: Invalid transaction (bad signature)";
diff --git a/src/ripple/app/tx/Transaction.cpp b/src/ripple/app/tx/Transaction.cpp
index 0ba88e4be..8c7f83ec5 100644
--- a/src/ripple/app/tx/Transaction.cpp
+++ b/src/ripple/app/tx/Transaction.cpp
@@ -69,7 +69,7 @@ Transaction::pointer Transaction::sharedTransaction (
 bool Transaction::checkSign () const
 {
     if (mFromPubKey.isValid ())
-        return mTransaction->checkSign (mFromPubKey);
+        return mTransaction->checkSign();
 
     WriteLog (lsWARNING, Ledger) << "Transaction has bad source public key";
     return false;
diff --git a/src/ripple/protocol/STTx.h b/src/ripple/protocol/STTx.h
index 1d1b1d911..abe045bb5 100644
--- a/src/ripple/protocol/STTx.h
+++ b/src/ripple/protocol/STTx.h
@@ -111,7 +111,6 @@ public:
     void sign (RippleAddress const& private_key);
 
     bool checkSign () const;
-    bool checkSign (RippleAddress const& public_key) const;
 
     bool isKnownGood () const
     {
diff --git a/src/ripple/protocol/impl/STTx.cpp b/src/ripple/protocol/impl/STTx.cpp
index 03ed1ccd0..1b0e67d32 100644
--- a/src/ripple/protocol/impl/STTx.cpp
+++ b/src/ripple/protocol/impl/STTx.cpp
@@ -181,10 +181,15 @@ bool STTx::checkSign () const
     {
         try
         {
+            ECDSA const fullyCanonical = (getFlags() & tfFullyCanonicalSig)
+                ? ECDSA::strict
+                : ECDSA::not_strict;
+
             RippleAddress n;
             n.setAccountPublic (getFieldVL (sfSigningPubKey));
 
-            sig_state_ = checkSign (n);
+            sig_state_ = n.accountPublicVerify (getSigningHash (),
+                getFieldVL (sfTxnSignature), fullyCanonical);
         }
         catch (...)
         {
@@ -197,23 +202,6 @@ bool STTx::checkSign () const
     return static_cast<bool> (sig_state_);
 }
 
-bool STTx::checkSign (RippleAddress const& public_key) const
-{
-    try
-    {
-        ECDSA const fullyCanonical = (getFlags() & tfFullyCanonicalSig)
-            ? ECDSA::strict
-            : ECDSA::not_strict;
-
-        return public_key.accountPublicVerify (getSigningHash (),
-            getFieldVL (sfTxnSignature), fullyCanonical);
-    }
-    catch (...)
-    {
-        return false;
-    }
-}
-
 void STTx::setSigningPubKey (RippleAddress const& naSignPubKey)
 {
     setFieldVL (sfSigningPubKey, naSignPubKey.getAccountPublic ());