diff --git a/docs/modules/ROOT/pages/utilities.adoc b/docs/modules/ROOT/pages/utilities.adoc
index cdbb09d93..09c6b029c 100644
--- a/docs/modules/ROOT/pages/utilities.adoc
+++ b/docs/modules/ROOT/pages/utilities.adoc
@@ -15,7 +15,7 @@ The data signer can be recovered with xref:api:cryptography.adoc#ECDSA-recover-b
 ----
 using ECDSA for bytes32;
 
-function _verify(bytes32 data, address account) pure returns (bool) {
+function _verify(bytes32 data, bytes memory signature, address account) internal pure returns (bool) {
     return keccak256(data)
         .toEthSignedMessageHash()
         .recover(signature) == account;