diff --git a/contracts/libraries/helpers/Errors.sol b/contracts/libraries/helpers/Errors.sol
index 48fc7f32..42d93a39 100644
--- a/contracts/libraries/helpers/Errors.sol
+++ b/contracts/libraries/helpers/Errors.sol
@@ -45,10 +45,12 @@ library Errors {
   string public constant INVALID_EQUAL_ASSETS_TO_SWAP = '56';
   string public constant NO_MORE_RESERVES_ALLOWED = '59';
 
-  // require error messages - aToken
+  // require error messages - aToken - DebtTokens
   string public constant CALLER_MUST_BE_LENDING_POOL = '28'; // 'The caller of this function must be a lending pool'
   string public constant CANNOT_GIVE_ALLOWANCE_TO_HIMSELF = '30'; // 'User cannot give allowance to himself'
   string public constant TRANSFER_AMOUNT_NOT_GT_0 = '31'; // 'Transferred amount needs to be greater than zero'
+  string public constant INVALID_MINT_AMOUNT = '53'; //invalid amount to mint
+  string public constant INVALID_BURN_AMOUNT = '53'; //invalid amount to burn
 
   // require error messages - ReserveLogic
   string public constant RESERVE_ALREADY_INITIALIZED = '34'; // 'Reserve has already been initialized'
diff --git a/contracts/tokenization/AToken.sol b/contracts/tokenization/AToken.sol
index 98c54bcd..8dcf669e 100644
--- a/contracts/tokenization/AToken.sol
+++ b/contracts/tokenization/AToken.sol
@@ -101,7 +101,9 @@ contract AToken is VersionedInitializable, IncentivizedERC20, IAToken {
     uint256 amount,
     uint256 index
   ) external override onlyLendingPool {
-    _burn(user, amount.rayDiv(index));
+    uint256 amountScaled = amount.rayDiv(index);
+    require(amountScaled != 0, Errors.INVALID_BURN_AMOUNT);
+    _burn(user, amountScaled);
 
     //transfers the underlying to the target
     IERC20(UNDERLYING_ASSET_ADDRESS).safeTransfer(receiverOfUnderlying, amount);
@@ -122,8 +124,9 @@ contract AToken is VersionedInitializable, IncentivizedERC20, IAToken {
     uint256 amount,
     uint256 index
   ) external override onlyLendingPool {
-    //mint an equivalent amount of tokens to cover the new deposit
-    _mint(user, amount.rayDiv(index));
+    uint256 amountScaled = amount.rayDiv(index);
+    require(amountScaled != 0, Errors.INVALID_MINT_AMOUNT);
+    _mint(user, amountScaled);
 
     //transfer event to track balances
     emit Transfer(address(0), user, amount);
diff --git a/contracts/tokenization/VariableDebtToken.sol b/contracts/tokenization/VariableDebtToken.sol
index 5e0f2dff..e7bd7309 100644
--- a/contracts/tokenization/VariableDebtToken.sol
+++ b/contracts/tokenization/VariableDebtToken.sol
@@ -7,6 +7,7 @@ import {SafeMath} from '@openzeppelin/contracts/math/SafeMath.sol';
 import {DebtTokenBase} from './base/DebtTokenBase.sol';
 import {WadRayMath} from '../libraries/math/WadRayMath.sol';
 import {IVariableDebtToken} from './interfaces/IVariableDebtToken.sol';
+import {Errors} from '../libraries/helpers/Errors.sol';
 
 /**
  * @title contract VariableDebtToken
@@ -60,7 +61,10 @@ contract VariableDebtToken is DebtTokenBase, IVariableDebtToken {
     uint256 index
   ) external override onlyLendingPool {
     
-    _mint(user, amount.rayDiv(index));
+    uint256 amountScaled = amount.rayDiv(index);
+    require(amountScaled != 0, Errors.INVALID_MINT_AMOUNT);
+
+    _mint(user, amountScaled);
 
     emit Transfer(address(0), user, amount);
     emit Mint(user, amount, index);
@@ -76,7 +80,11 @@ contract VariableDebtToken is DebtTokenBase, IVariableDebtToken {
     uint256 amount,
     uint256 index
   ) external override onlyLendingPool {
-    _burn(user, amount.rayDiv(index));
+
+    uint256 amountScaled = amount.rayDiv(index);
+    require(amountScaled != 0, Errors.INVALID_BURN_AMOUNT);
+
+    _burn(user, amountScaled);
 
     emit Transfer(user, address(0), amount);
     emit Burn(user, amount, index);