diff --git a/CHANGELOG.md b/CHANGELOG.md
index 86b996f4..a95c0220 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.9.5] - 2023-12-05
+
+### Fixed
+
+- `:RustLsp flyCheck`: Typo in LSP client request,
+  causing the command to do nothing.
+
 ## [3.9.4] - 2023-12-01
 
 ### Fixed
diff --git a/README.md b/README.md
index d1ab486d..438cb795 100644
--- a/README.md
+++ b/README.md
@@ -373,6 +373,12 @@ for more configuration options.
   vim.cmd.RustLsp { 'flyCheck', 'clear' }
   vim.cmd.RustLsp { 'flyCheck', 'cancel' }
   ```
+
+  > [!NOTE]
+  >
+  > This is only useful if you set the option,
+  > `['rust-analzyer'].checkOnSave = false`.
+
 </details>
 
 <!-- markdownlint-restore -->
diff --git a/lua/rustaceanvim/commands/fly_check.lua b/lua/rustaceanvim/commands/fly_check.lua
index 82e77c07..79f0f757 100644
--- a/lua/rustaceanvim/commands/fly_check.lua
+++ b/lua/rustaceanvim/commands/fly_check.lua
@@ -7,7 +7,7 @@ local rl = require('rustaceanvim.rust_analyzer')
 ---@param cmd flyCheckCommand
 function M.fly_check(cmd)
   local params = cmd == 'run' and vim.lsp.util.make_text_document_params() or {}
-  rl.notify('rust-analyzer/' .. cmd .. 'FlyCheck', params)
+  rl.notify('rust-analyzer/' .. cmd .. 'Flycheck', params)
 end
 
 return M.fly_check