diff --git a/app/scripts/uiFuncs.js b/app/scripts/uiFuncs.js
index 6d09394cff..4af38e5092 100644
--- a/app/scripts/uiFuncs.js
+++ b/app/scripts/uiFuncs.js
@@ -56,7 +56,7 @@ uiFuncs.signTxTrezor = function(rawTx, txData, callback) {
     );
 }
 uiFuncs.signTxLedger = function(app, eTx, rawTx, txData, old, callback) {
-    eTx.raw[6] = Buffer.from([rawTx.chainId]);
+    eTx.raw[6] = rawTx.chainId;
     eTx.raw[7] = eTx.raw[8] = 0;
     var toHash = old ? eTx.raw.slice(0, 6) : eTx.raw;
     var txToSign = ethUtil.rlp.encode(toHash);
@@ -69,7 +69,17 @@ uiFuncs.signTxLedger = function(app, eTx, rawTx, txData, old, callback) {
             });
             return;
         }
-        rawTx.v = "0x" + result['v'];
+        var v = result['v'].toString(16);
+        if (!old) {
+            // EIP155 support. check/recalc signature v value.
+            var rv = parseInt(v, 16);
+            var cv = rawTx.chainId * 2 + 35;
+            if (rv !== cv && (rv & cv) !== rv) {
+                cv += 1; // add signature v bit.
+            }
+            v = cv.toString(16);
+        }
+        rawTx.v = "0x" + v;
         rawTx.r = "0x" + result['r'];
         rawTx.s = "0x" + result['s'];
         eTx = new ethUtil.Tx(rawTx);