_nextDraw(_nextNumberOfTiers, uint96(_contributionsForDraw(lastClosedDrawId + 1)));
  function increaseReserve(uint104 _amount) external {
    _reserve += _amount;
    prizeToken.safeTransferFrom(msg.sender, address(this), _amount);
    emit IncreaseReserve(msg.sender, _amount);
  }
  function _accountedBalance() internal view returns (uint256) {
    Observation memory obs = DrawAccumulatorLib.newestObservation(totalAccumulator);
    return (obs.available + obs.disbursed) - _totalWithdrawn;
  }
function contributePrizeTokens(address _prizeVault, uint256 _amount) external returns (uint256) {
    uint256 _deltaBalance = prizeToken.balanceOf(address(this)) - _accountedBalance();
diff --git a/src/PrizePool.sol b/src/PrizePool.sol
index a42a27e..3c14476 100644
--- a/src/PrizePool.sol
+++ b/src/PrizePool.sol
@@ -233,6 +233,9 @@ contract PrizePool is TieredLiquidityDistributor {
   /// @notice The total amount of prize tokens that have been claimed for all time.
   uint256 internal _totalWithdrawn;
 
+  /// @notice The total amount of reserve injections that have been performed for all time.
+  uint256 internal _reserveInjections;
+
   /// @notice The winner random number for the last closed draw.
   uint256 internal _winningRandomNumber;
 
@@ -497,6 +500,7 @@ contract PrizePool is TieredLiquidityDistributor {
   /// @param _amount The amount of tokens to increase the reserve by
   function increaseReserve(uint104 _amount) external {
     _reserve += _amount;
+    _reserveInjections += amount;
     prizeToken.safeTransferFrom(msg.sender, address(this), _amount);
     emit IncreaseReserve(msg.sender, _amount);
   }
@@ -742,7 +746,7 @@ contract PrizePool is TieredLiquidityDistributor {
   /// @return The balance of tokens that have been accounted for
   function _accountedBalance() internal view returns (uint256) {
     Observation memory obs = DrawAccumulatorLib.newestObservation(totalAccumulator);
-    return (obs.available + obs.disbursed) - _totalWithdrawn;
+    return (obs.available + obs.disbursed) - _totalWithdrawn + _reserveInjections;
   }
 
   /// @notice Returns the start time of the draw for the next successful closeDraw
