diff --git a/contracts/token/PausableToken.sol b/contracts/token/PausableToken.sol
index bf52e6b9ea6..428fb990b53 100644
--- a/contracts/token/PausableToken.sol
+++ b/contracts/token/PausableToken.sol
@@ -11,11 +11,23 @@ import '../lifecycle/Pausable.sol';
 
 contract PausableToken is StandardToken, Pausable {
 
-  function transfer(address _to, uint256 _value) whenNotPaused public returns (bool) {
+  function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
     return super.transfer(_to, _value);
   }
 
-  function transferFrom(address _from, address _to, uint256 _value) whenNotPaused public returns (bool) {
+  function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
     return super.transferFrom(_from, _to, _value);
   }
+
+  function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
+    return super.approve(_spender, _value);
+  }
+
+  function increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) {
+    return super.increaseApproval(_spender, _addedValue);
+  }
+
+  function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) {
+    return super.decreaseApproval(_spender, _subtractedValue);
+  }
 }
diff --git a/contracts/token/StandardToken.sol b/contracts/token/StandardToken.sol
index 6f4537d4e67..728fa709991 100644
--- a/contracts/token/StandardToken.sol
+++ b/contracts/token/StandardToken.sol
@@ -26,7 +26,7 @@ contract StandardToken is ERC20, BasicToken {
   function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
     require(_to != address(0));
 
-    var _allowance = allowed[_from][msg.sender];
+    uint256 _allowance = allowed[_from][msg.sender];
 
     // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
     // require (_value <= _allowance);
@@ -49,7 +49,7 @@ contract StandardToken is ERC20, BasicToken {
     //  allowance to zero by calling `approve(_spender, 0)` if it is not
     //  already 0 to mitigate the race condition described here:
     //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
-    require((_value == 0) || (allowed[msg.sender][_spender] == 0));
+    // require((_value == 0) || (allowed[msg.sender][_spender] == 0));
 
     allowed[msg.sender][_spender] = _value;
     Approval(msg.sender, _spender, _value);