diff --git a/contracts/token/erc721/abstract/ImmutableERC721Base.sol b/contracts/token/erc721/abstract/ImmutableERC721Base.sol
index d93a61a4..36c1a764 100644
--- a/contracts/token/erc721/abstract/ImmutableERC721Base.sol
+++ b/contracts/token/erc721/abstract/ImmutableERC721Base.sol
@@ -241,7 +241,7 @@ abstract contract ImmutableERC721Base is OperatorAllowlistEnforced, MintingAcces
         }
 
         // slither-disable-next-line costly-loop
-        _totalSupply = _totalSupply + mintRequest.tokenIds.length;
+        _totalSupply += mintRequest.tokenIds.length;
         for (uint256 j = 0; j < mintRequest.tokenIds.length; j++) {
             _mint(mintRequest.to, mintRequest.tokenIds[j]);
         }
@@ -260,7 +260,7 @@ abstract contract ImmutableERC721Base is OperatorAllowlistEnforced, MintingAcces
             _safeMint(mintRequest.to, mintRequest.tokenIds[j]);
         }
         // slither-disable-next-line costly-loop
-        _totalSupply = _totalSupply + mintRequest.tokenIds.length;
+        _totalSupply += mintRequest.tokenIds.length;
     }
 
     /**