diff --git a/book/src/jsonrpc-api.md b/book/src/jsonrpc-api.md
index 582b92820a..c723c98993 100644
--- a/book/src/jsonrpc-api.md
+++ b/book/src/jsonrpc-api.md
@@ -169,12 +169,10 @@ events.
 * `string` - Signature of Transaction to confirm, as base-58 encoded string
 
 ##### Results:
-* `string` - Transaction status:
-    * `Confirmed` - Transaction was successful
-    * `SignatureNotFound` - Unknown transaction
-    * `ProgramRuntimeError` - An error occurred in the program that processed this Transaction
-    * `AccountInUse` - Another Transaction had a write lock one of the Accounts specified in this Transaction.  The Transaction may succeed if retried
-    * `GenericFailure` - Some other error occurred.  **Note**: In the future new Transaction statuses may be added to this list.  It's safe to assume that all new statuses will be more specific error conditions that previously presented as `GenericFailure`
+* `null` - Unknown transaction
+* `object` - Transaction status:
+    * `"Ok": null` - Transaction was successful
+    * `"Err": <ERR>` - Transaction failed with TransactionError <ERR> [TransactionError definitions](https://github.com/solana-labs/solana/blob/master/sdk/src/transaction.rs#L14)
 
 ##### Example:
 ```bash
diff --git a/book/src/wallet.md b/book/src/wallet.md
index 400761a691..448be47232 100644
--- a/book/src/wallet.md
+++ b/book/src/wallet.md
@@ -41,7 +41,7 @@ $ solana-wallet balance
 $ solana-wallet confirm <TX_SIGNATURE>
 
 // Return
-"Confirmed" / "Not found"
+"Confirmed" / "Not found" / "Transaction failed with error <ERR>"
 ```
 
 #### Deploy program
@@ -352,4 +352,3 @@ ARGS:
     <PUBKEY>        The pubkey of recipient
     <PROCESS_ID>    The process id of the transfer to unlock
 ```
-