diff --git a/public/views/paperWallet.html b/public/views/paperWallet.html
index 630f9a066..fa6f83c96 100644
--- a/public/views/paperWallet.html
+++ b/public/views/paperWallet.html
@@ -4,21 +4,21 @@
   ng-init="titleSection='Sweep paper wallet'; goBackToState = 'preferencesAdvanced';">
 </div>
 
-<div class="content preferences" ng-controller="paperWalletController as paperWallet">
-  <h4 ng-show="!paperWallet.error"></h4>
-  <div class="box-notification m20b" ng-show="paperWallet.error">
-    <span class="text-warning">{{paperWallet.error|translate}}</span>
+<div class="content preferences" ng-controller="paperWalletController">
+  <h4 ng-show="!error"></h4>
+  <div class="box-notification m20b" ng-show="error">
+    <span class="text-warning">{{error|translate}}</span>
   </div>
-  <form ng-show="!paperWallet.balance" class="oh">
+  <form ng-show="!balance" class="oh">
     <div class="row">
       <div class="large-12 medium-12 columns">
         <div class="input">
           <label for="inputData" translate>Paper Wallet Private Key</label>
-          <input type="text" placeholder="{{'Paste your paper wallet private key here'|translate}}" ng-model="inputData" id="inputData" ng-change="paperWallet.onData(inputData)">
+          <input type="text" placeholder="{{'Paste your paper wallet private key here'|translate}}" ng-model="inputData" id="inputData" ng-change="onData(inputData)">
           <div class="qr-scanner-input">
-            <qr-scanner on-scan="paperWallet.onQrCodeScanned(data)"></qr-scanner>
+            <qr-scanner on-scan="onQrCodeScanned(data)"></qr-scanner>
           </div>
-          <div ng-show="paperWallet.isPkEncrypted">
+          <div ng-show="isPkEncrypted">
             <label for="passphrase">
               <span translate>Password</span>
             </label>
@@ -28,30 +28,30 @@
             </p>
           </div>
           <button
-            ng-disabled="paperWallet.scanning || !paperWallet.scannedKey"
+            ng-disabled="scanning || !scannedKey"
             ng-style="{'background-color':index.backgroundColor}"
             class="button black round expand"
-            ng-click="paperWallet.scanFunds()"
+            ng-click="scanFunds()"
             translate>Scan Wallet Funds
           </button>
         </div>
       </div>
     </div>
   </form>
-  <div ng-show="paperWallet.balance" class="row">
+  <div ng-show="balance" class="row">
      <div class="large-12 medium-12 columns">
        <div class="text-center m20b">
          <h4 class="text-bold" translate>Funds found</h4>
          <div class="size-24">
-           {{paperWallet.balance}}
+           {{balance}}
          </div>
        </div>
 
       <button
-        ng-disabled="paperWallet.sending || paperWallet.balanceSat <= 0"
+        ng-disabled="sending || balanceSat <= 0"
         ng-style="{'background-color':index.backgroundColor}"
         class="button black round expand"
-        ng-click="paperWallet.sweepWallet()"
+        ng-click="sweepWallet()"
         translate>Sweep Wallet
       </button>
     </div>
diff --git a/src/js/controllers/paperWallet.js b/src/js/controllers/paperWallet.js
index e0f7c143f..c5f244608 100644
--- a/src/js/controllers/paperWallet.js
+++ b/src/js/controllers/paperWallet.js
@@ -1,21 +1,20 @@
 angular.module('copayApp.controllers').controller('paperWalletController',
-  function($scope, $http, $timeout, $log, configService, profileService, go, addressService, txStatus, bitcore, ongoingProcess) {
-    var self = this;
+  function($scope, $timeout, $log, configService, profileService, go, addressService, txStatus, bitcore, ongoingProcess) {
     var fc = profileService.focusedClient;
     var rawTx;
 
-    self.onQrCodeScanned = function(data) {
+    $scope.onQrCodeScanned = function(data) {
       $scope.inputData = data;
-      self.onData(data);
-    }
+      $scope.onData(data);
+    };
 
-    self.onData = function(data) {
-      self.error = '';
-      self.scannedKey = data;
-      self.isPkEncrypted = (data.substring(0,2) == '6P');
-    }
+    $scope.onData = function(data) {
+      $scope.error = null;
+      $scope.scannedKey = data;
+      $scope.isPkEncrypted = (data.substring(0, 2) == '6P');
+    };
 
-    self._scanFunds = function(cb) {
+    function _scanFunds(cb) {
       function getPrivateKey(scannedKey, isPkEncrypted, passphrase, cb) {
         if (!isPkEncrypted) return cb(null, scannedKey);
         fc.decryptBIP38PrivateKey(scannedKey, passphrase, null, cb);
@@ -32,9 +31,9 @@ angular.module('copayApp.controllers').controller('paperWalletController',
           return false;
         }
         return true;
-      }
+      };
 
-      getPrivateKey(self.scannedKey, self.isPkEncrypted, $scope.passphrase, function(err, privateKey) {
+      getPrivateKey($scope.scannedKey, $scope.isPkEncrypted, $scope.passphrase, function(err, privateKey) {
         if (err) return cb(err);
         if (!checkPrivateKey(privateKey)) return cb(new Error('Invalid private key'));
 
@@ -43,37 +42,37 @@ angular.module('copayApp.controllers').controller('paperWalletController',
           return cb(null, privateKey, balance);
         });
       });
-    }
+    };
 
-    self.scanFunds = function() {
-      self.privateKey = '';
-      self.balanceSat = 0;
-      self.error = '';
+    $scope.scanFunds = function() {
+      $scope.privateKey = '';
+      $scope.balanceSat = 0;
+      $scope.error = null;
 
       ongoingProcess.set('scanning', true);
       $timeout(function() {
-        self._scanFunds(function(err, privateKey, balance) {
+        _scanFunds(function(err, privateKey, balance) {
           ongoingProcess.set('scanning', false);
           if (err) {
             $log.error(err);
-            self.error = err.message || err.toString();
+            $scope.error = err.message || err.toString();
           } else {
-            self.privateKey = privateKey;
-            self.balanceSat = balance;
+            $scope.privateKey = privateKey;
+            $scope.balanceSat = balance;
             var config = configService.getSync().wallet.settings;
-            self.balance = profileService.formatAmount(balance) + ' ' + config.unitName;
+            $scope.balance = profileService.formatAmount(balance) + ' ' + config.unitName;
           }
 
           $scope.$apply();
         });
       }, 100);
-    }
+    };
 
-    self._sweepWallet = function(cb) {
+    function _sweepWallet(cb) {
       addressService.getAddress(fc.credentials.walletId, true, function(err, destinationAddress) {
         if (err) return cb(err);
 
-        fc.buildTxFromPrivateKey(self.privateKey, destinationAddress, null, function(err, tx) {
+        fc.buildTxFromPrivateKey($scope.privateKey, destinationAddress, null, function(err, tx) {
           if (err) return cb(err);
 
           fc.broadcastRawTx({
@@ -87,17 +86,17 @@ angular.module('copayApp.controllers').controller('paperWalletController',
       });
     };
 
-    self.sweepWallet = function() {
+    $scope.sweepWallet = function() {
       ongoingProcess.set('sweepingWallet', true);
-      self.sending = true;
-      self.error = '';
+      $scope.sending = true;
+      $scope.error = null;
 
       $timeout(function() {
-        self._sweepWallet(function(err, destinationAddress, txid) {
+        _sweepWallet(function(err, destinationAddress, txid) {
           ongoingProcess.set('sweepingWallet', false);
 
           if (err) {
-            self.error = err.message || err.toString();
+            $scope.error = err.message || err.toString();
             $log.error(err);
           } else {
             txStatus.notify({
@@ -110,5 +109,5 @@ angular.module('copayApp.controllers').controller('paperWalletController',
           $scope.$apply();
         });
       }, 100);
-    }
+    };
   });