diff --git a/Documentation/Usage.md b/Documentation/Usage.md
index 5224c97b3..fbafaa3e2 100755
--- a/Documentation/Usage.md
+++ b/Documentation/Usage.md
@@ -170,7 +170,7 @@ if wallet.isHD {
 ```swift
 let password = "web3swift"
 let ethereumAddress = EthereumAddress(wallet.address)!
-let pkData = try! keysoreManager.UNSAFE_getPrivateKeyData(password: password, account: ethereumAddress).toHexString()
+let pkData = try! keystoreManager.UNSAFE_getPrivateKeyData(password: password, account: ethereumAddress).toHexString()
 ```
 
 ## Ethereum Endpoints interaction