diff --git a/remix-debugger/src/ui/StackPanel.js b/remix-debugger/src/ui/StackPanel.js
index c07aa01094..de768dc616 100644
--- a/remix-debugger/src/ui/StackPanel.js
+++ b/remix-debugger/src/ui/StackPanel.js
@@ -1,7 +1,5 @@
 'use strict'
 var DropdownPanel = require('./DropdownPanel')
-var remixLib = require('remix-lib')
-var ui = remixLib.helpers.ui
 var yo = require('yo-yo')
 
 function StackPanel (_parent, _traceManager) {
@@ -26,19 +24,10 @@ StackPanel.prototype.init = function () {
         self.basicPanel.update({})
         console.log(error)
       } else if (self.parent.currentStepIndex === index) {
-        self.basicPanel.update(self.format(stack))
+        self.basicPanel.update(stack)
       }
     })
   })
 }
 
-StackPanel.prototype.format = function (stack) {
-  var ret = []
-  stack.map(function (item, i) {
-    var hex = ui.normalizeHex(item)
-    ret.push(hex)
-  })
-  return ret
-}
-
 module.exports = StackPanel
diff --git a/remix-lib/src/helpers/traceHelper.js b/remix-lib/src/helpers/traceHelper.js
index c3eef50e91..a4fb9695eb 100644
--- a/remix-lib/src/helpers/traceHelper.js
+++ b/remix-lib/src/helpers/traceHelper.js
@@ -8,7 +8,7 @@ module.exports = {
       return this.contractCreationToken(vmTraceIndex)
     } else if (this.isCallInstruction(step)) {
       var stack = step.stack // callcode, delegatecall, ...
-      return ui.normalizeHex(stack[stack.length - 2])
+      return ui.normalizeHexAddress(stack[stack.length - 2])
     }
     return undefined
   },
diff --git a/remix-lib/src/helpers/uiHelper.js b/remix-lib/src/helpers/uiHelper.js
index 492ae252a0..99dfeb5970 100644
--- a/remix-lib/src/helpers/uiHelper.js
+++ b/remix-lib/src/helpers/uiHelper.js
@@ -68,6 +68,18 @@ module.exports = {
     return '0x' + hex
   },
 
+  normalizeHexAddress: function (hex) {
+    if (hex.indexOf('0x') === 0) hex = hex.replace('0x', '')
+    if (hex.length >= 40) {
+      var reg = /(.{40})$/.exec(hex)
+      if (reg) {
+        return '0x' + reg[0]
+      }
+    } else {
+      return '0x' + (new Array(40 - hex.length + 1).join('0')) + hex
+    }
+  },
+
   runInBrowser: function () {
     return typeof window !== 'undefined'
   }
diff --git a/remix-lib/src/web3Provider/web3VmProvider.js b/remix-lib/src/web3Provider/web3VmProvider.js
index b7dec2cb21..5294e925f3 100644
--- a/remix-lib/src/web3Provider/web3VmProvider.js
+++ b/remix-lib/src/web3Provider/web3VmProvider.js
@@ -168,7 +168,7 @@ web3VmProvider.prototype.pushTrace = function (self, data) {
       this.processingAddress = traceHelper.contractCreationToken(this.processingIndex)
       this.storageCache[this.processingHash][this.processingAddress] = {}
     } else {
-      this.processingAddress = uiutil.normalizeHex(step.stack[step.stack.length - 2])
+      this.processingAddress = uiutil.normalizeHexAddress(step.stack[step.stack.length - 2])
       if (!self.storageCache[self.processingHash][this.processingAddress]) {
         self.vm.stateManager.dumpStorage(this.processingAddress, function (storage) {
           self.storageCache[self.processingHash][self.processingAddress] = storage