diff --git a/src/ripple/app/tx/Transaction.cpp b/src/ripple/app/tx/Transaction.cpp
index fac6c63ee..c2d7ca54f 100644
--- a/src/ripple/app/tx/Transaction.cpp
+++ b/src/ripple/app/tx/Transaction.cpp
@@ -189,18 +189,4 @@ Json::Value Transaction::getJson (int options, bool binary) const
     return ret;
 }
 
-bool Transaction::isHexTxID (std::string const& txid)
-{
-    if (txid.size () != 64)
-        return false;
-
-    auto const ret = std::find_if (txid.begin (), txid.end (),
-        [](std::string::value_type c)
-        {
-            return !std::isxdigit (c);
-        });
-
-    return (ret == txid.end ());
-}
-
 } // ripple
diff --git a/src/ripple/app/tx/Transaction.h b/src/ripple/app/tx/Transaction.h
index d1694e871..7c4626000 100644
--- a/src/ripple/app/tx/Transaction.h
+++ b/src/ripple/app/tx/Transaction.h
@@ -119,8 +119,6 @@ public:
 
     static Transaction::pointer load (uint256 const& id);
 
-    static bool isHexTxID (std::string const&);
-
 private:
     uint256         mTransactionID;
     RippleAddress   mAccountFrom;
diff --git a/src/ripple/rpc/handlers/Tx.cpp b/src/ripple/rpc/handlers/Tx.cpp
index 98f2efba8..a874578dd 100644
--- a/src/ripple/rpc/handlers/Tx.cpp
+++ b/src/ripple/rpc/handlers/Tx.cpp
@@ -25,6 +25,23 @@ namespace ripple {
 // {
 //   transaction: <hex>
 // }
+
+static
+bool
+isHexTxID (std::string const& txid)
+{
+    if (txid.size () != 64)
+        return false;
+
+    auto const ret = std::find_if (txid.begin (), txid.end (),
+        [](std::string::value_type c)
+        {
+            return !std::isxdigit (c);
+        });
+
+    return (ret == txid.end ());
+}
+
 Json::Value doTx (RPC::Context& context)
 {
     if (!context.params.isMember (jss::transaction))
@@ -35,7 +52,7 @@ Json::Value doTx (RPC::Context& context)
 
     auto const txid  = context.params[jss::transaction].asString ();
 
-    if (!Transaction::isHexTxID (txid))
+    if (!isHexTxID (txid))
         return rpcError (rpcNOT_IMPL);
 
     auto txn = getApp().getMasterTransaction ().fetch (uint256 (txid), true);