diff --git a/Customization.md b/Customization.md
index 939f5cc..e6bd47d 100644
--- a/Customization.md
+++ b/Customization.md
@@ -1,7 +1,7 @@
 ## Callbacks for GVim
 
 ```vim
-function! g:goyo_before()
+function! Goyo_before()
   if has('gui_running')
     set fullscreen
     set background=light
@@ -11,7 +11,7 @@ function! g:goyo_before()
   endif
 endfunction
 
-function! g:goyo_after()
+function! Goyo_after()
   if has('gui_running')
     set nofullscreen
     set background=dark
@@ -21,7 +21,7 @@ function! g:goyo_after()
   endif
 endfunction
 
-let g:goyo_callbacks = [function('g:goyo_before'), function('g:goyo_after')]
+let g:goyo_callbacks = [function('Goyo_before'), function('Goyo_after')]
 ```
 
 ## Disabling plugins
@@ -42,17 +42,17 @@ let g:goyo_callbacks = [function('s:goyo_before')]
 - by [EPNGH](https://github.com/EPNGH)
 
 ```vim
-function! g:goyo_before()
+function! Goyo_before()
   delcommand ZoomWin
   delcommand <Plug>ZoomWin
 endfunction
 
-function! g:goyo_after()
+function! Goyo_after()
   command! ZoomWin call ZoomWin()
   command! <Plug>ZoomWin call ZoomWin()
 endfunction
 
-let g:goyo_callbacks = [function('g:goyo_before'), function('g:goyo_after')]
+let g:goyo_callbacks = [function('Goyo_before'), function('Goyo_after')]
 ```
 
 ## Ensure `:q` to quit even when Goyo is active
@@ -60,14 +60,14 @@ let g:goyo_callbacks = [function('g:goyo_before'), function('g:goyo_after')]
 Suggested by [mm2703](https://github.com/mm2703) and [axelGschaider](https://github.com/axelGschaider) in [#16](https://github.com/junegunn/goyo.vim/issues/16)
 
 ```vim
-function! g:goyo_before()
+function! Goyo_before()
   let b:quitting = 0
   let b:quitting_bang = 0
   autocmd QuitPre <buffer> let b:quitting = 1
   cabbrev <buffer> q! let b:quitting_bang = 1 <bar> q!
 endfunction
 
-function! g:goyo_after()
+function! Goyo_after()
   " Quit Vim if this is the only remaining buffer
   if b:quitting && len(filter(range(1, bufnr('$')), 'buflisted(v:val)')) == 1
     if b:quitting_bang
@@ -78,5 +78,5 @@ function! g:goyo_after()
   endif
 endfunction
 
-let g:goyo_callbacks = [function('g:goyo_before'), function('g:goyo_after')]
+let g:goyo_callbacks = [function('Goyo_before'), function('Goyo_after')]
 ```