diff --git a/README.md b/README.md
index 90ebe50..9ee62c1 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@
 <img align="right" src="./etc/logo.png" with="138" height="46">
 
 # flymake-languagetool
+
 > Flymake support for LanguageTool.
 
 [![CI](https://github.com/emacs-languagetool/flymake-languagetool/actions/workflows/test.yml/badge.svg)](https://github.com/emacs-languagetool/flymake-languagetool/actions/workflows/test.yml)
@@ -21,6 +22,7 @@ The instruction to use this plugin.
 2. Consider adding one of the following snippets to your configuration.
 
 #### Local LanguageTool Server
+
 ```el
 (use-package flymake-languagetool
   :ensure t
@@ -35,6 +37,7 @@ The instruction to use this plugin.
 ```
 
 #### Free LanguageTool Account
+
 ```el
 (use-package flymake-languagetool
   :ensure t
@@ -49,6 +52,7 @@ The instruction to use this plugin.
 ```
 
 #### Premium LanguageTool Account
+
 ```el
 (use-package flymake-languagetool
   :ensure t
@@ -78,13 +82,15 @@ included in `flymake-languagetool-active-modes`.
 ## 🧪 Configuration
 
 ### Sentence Awareness
+
 `flymake-languagetool` now uses emacs sentence navigation to send only portions
 of the text that have been modified rather than the entire buffer. In order for
 this to behave in an expected manner, you may have to modify
 `sentence-end-double-space`. The default is set to `true` and may cause some
 contextual issues if you only use a single space to separate sentences.
 
-### language
+### Language
+
 The language used for flymake can be customized by using
 `flymake-languagetool-language` (Default `"en-US"`)
 
diff --git a/flymake-languagetool.el b/flymake-languagetool.el
index 3d0c892..fc0019e 100644
--- a/flymake-languagetool.el
+++ b/flymake-languagetool.el
@@ -41,6 +41,7 @@
 
 ;; Dynamically bound.
 (defvar url-http-end-of-headers)
+(defvar forward-sentence-function)
 
 (defgroup flymake-languagetool nil
   "Flymake support for LanguageTool."