diff --git a/contracts/utils/Memory.sol b/contracts/utils/Memory.sol
index bd21666b1d5..fd53a58de5d 100644
--- a/contracts/utils/Memory.sol
+++ b/contracts/utils/Memory.sol
@@ -114,10 +114,11 @@ library Memory {
 
     /// @dev Returns true if the two slices contain the same data.
     function equal(Slice a, Slice b) internal pure returns (bool result) {
-        Memory.Pointer ptrA = _pointer(a);
-        Memory.Pointer ptrB = _pointer(b);
         uint256 lenA = length(a);
         uint256 lenB = length(b);
+        if (lenA != lenB) return false;
+        Memory.Pointer ptrA = _pointer(a);
+        Memory.Pointer ptrB = _pointer(b);
         assembly ("memory-safe") {
             result := eq(keccak256(ptrA, lenA), keccak256(ptrB, lenB))
         }