diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9282b9de039..80fd7ae1f2f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -50,6 +50,11 @@ Release channels have their own copy of this changelog:
 * `withdraw-stake` now accepts the `AVAILABLE` keyword for the amount, allowing withdrawal of unstaked lamports (#4483)
 * `solana-test-validator` will now bind to localhost (127.0.0.1) by default rather than all interfaces to improve security. Provide `--bind-address 0.0.0.0` to bind to all interfaces to restore the previous default behavior.
 
+### RPC
+
+#### Changes
+* `simulateTransaction` now includes `loadedAccountsDataSize` in its result. `loadedAccountsDataSize` is the total number of bytes loaded for all accounts in the simulated transaction.
+
 ## 2.2.0
 
 ### CLI