diff --git a/Customization.md b/Customization.md
index fc00661..87a0b5e 100644
--- a/Customization.md
+++ b/Customization.md
@@ -1,7 +1,7 @@
 ## Callbacks for GVim
 
 ```vim
-function! Goyo_before()
+function! GoyoBefore()
   if has('gui_running')
     set fullscreen
     set background=light
@@ -11,7 +11,7 @@ function! Goyo_before()
   endif
 endfunction
 
-function! Goyo_after()
+function! GoyoAfter()
   if has('gui_running')
     set nofullscreen
     set background=dark
@@ -21,7 +21,7 @@ function! Goyo_after()
   endif
 endfunction
 
-let g:goyo_callbacks = [function('Goyo_before'), function('Goyo_after')]
+let g:goyo_callbacks = [function('GoyoBefore'), function('GoyoAfter')]
 ```
 
 ## Disabling plugins