diff --git a/doc/fugitive.txt b/doc/fugitive.txt
index bc1a707..df976a3 100644
--- a/doc/fugitive.txt
+++ b/doc/fugitive.txt
@@ -186,6 +186,11 @@ that are part of Git repositories).
                         "git instaweb" from a terminal).  If a range is given,
                         it is appropriately appended to the URL as an anchor.
 
+                        To use with GitHub FI, point g:fugitive_github_domains
+                        at a list of domains:
+>
+                        let g:fugitive_github_domains = ['git.example.com']
+~
 :[range]Gbrowse!        Like :Gbrowse, but put the URL on the clipboard rather
                         than opening it.
 
diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index 57999b6..e7e743f 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -1758,11 +1758,15 @@ endfunction
 
 function! s:github_url(repo,url,rev,commit,path,type,line1,line2) abort
   let path = a:path
-  let repo_path = matchstr(a:url,'^\%(https\=://\|git://\|git@\)github\.com[/:]\zs.\{-\}\ze\%(\.git\)\=$')
-  if repo_path ==# ''
+  let domain_pattern = 'github\.com'
+  for domain in exists('g:fugitive_github_domains') ? g:fugitive_github_domains : []
+    let domain_pattern .= '\|' . escape(domain, '.')
+  endfor
+  let repo = matchstr(a:url,'^\%(https\=://\|git://\|git@\)\zs\('.domain_pattern.'\)[/:].\{-\}\ze\%(\.git\)\=$')
+  if repo ==# ''
     return ''
   endif
-  let root = 'https://github.com/' . repo_path
+  let root = 'https://' . s:sub(repo,':','/')
   if path =~# '^\.git/refs/heads/'
     let branch = a:repo.git_chomp('config','branch.'.path[16:-1].'.merge')[11:-1]
     if branch ==# ''