diff --git a/src/NTokenStrategy.sol b/src/NTokenStrategy.sol
index 3e4e89cc..281dab90 100644
--- a/src/NTokenStrategy.sol
+++ b/src/NTokenStrategy.sol
@@ -3,6 +3,12 @@ pragma solidity ^0.8.13;
 
 import { IStrategy, Pool } from "src/interfaces/IStrategy.sol";
 
+/**
+ * @dev Thrown when the length of the deltas array is not the
+ * same as the length of the reserves array.
+ */
+error InvalidTokenDeltas();
+
 /**
  * @title N-token strategy base contract for DFMM.
  * @notice This abstract contract defines the basic behavior of
@@ -46,6 +52,9 @@ abstract contract NTokenStrategy is IStrategy {
         // we cannot assign to `deltaLiquidity` directly.
         (uint256[] memory maxTokenDeltas, uint256 deltaL) =
             abi.decode(data, (uint256[], uint256));
+        if (maxTokenDeltas.length != pool.reserves.length) {
+            revert InvalidTokenDeltas();
+        }
         deltaLiquidity = deltaL;
 
         (uint256[] memory deltas, uint256[] memory nextReserves) =
@@ -82,8 +91,11 @@ abstract contract NTokenStrategy is IStrategy {
     {
         (uint256[] memory minTokenDeltas, uint256 deltaL) =
             abi.decode(data, (uint256[], uint256));
-
+        if (minTokenDeltas.length != pool.reserves.length) {
+            revert InvalidTokenDeltas();
+        }
         deltaLiquidity = deltaL;
+
         (uint256[] memory deltas, uint256[] memory nextReserves) =
         _computeDeallocateDeltasAndReservesGivenDeltaL(
             deltaLiquidity, minTokenDeltas, pool