diff --git a/ERCS/erc-7201.md b/ERCS/erc-7201.md
index 05c4d07d5ed..d8f97af6550 100644
--- a/ERCS/erc-7201.md
+++ b/ERCS/erc-7201.md
@@ -36,7 +36,7 @@ A namespace in a contract should be implemented as a struct type. These structs
 
 ### Formula
 
-The formula identified by `erc7201` is defined as `erc7201(id: string) = keccak256(keccak256(id) - 1) & ~0xff`. In Solidity, this corresponds to the expression `keccak256(abi.encode(uint256(keccak256(id)) - 1)) & ~bytes32(uint256(0xff))`. When using this formula the annotation becomes `@custom:storage-location erc7201:<NAMESPACE_ID>`. For example, `@custom:storage-location erc7201:foobar` annotates a namespace with id `"foobar"` rooted at `erc7201("foobar")`.
+The formula identified by `erc7201` is defined as `erc7201(id: string) = keccak256(keccak256(id) - 1) & ~0xff`. In Solidity, this corresponds to the expression `keccak256(abi.encode(uint256(keccak256(bytes(id))) - 1)) & ~bytes32(uint256(0xff))`. When using this formula the annotation becomes `@custom:storage-location erc7201:<NAMESPACE_ID>`. For example, `@custom:storage-location erc7201:foobar` annotates a namespace with id `"foobar"` rooted at `erc7201("foobar")`.
 
 Future EIPs may define new formulas with unique formula identifiers. It is recommended to follow the convention set in this EIP and use an identifier of the format `erc1234`.