diff --git a/autoload/gitgutter/async.vim b/autoload/gitgutter/async.vim
index 78e725f..91a4511 100644
--- a/autoload/gitgutter/async.vim
+++ b/autoload/gitgutter/async.vim
@@ -129,8 +129,7 @@ endfunction
 
 
 function! s:channel_id(channel) abort
-  " This seems to be the only way to get info about the channel once closed.
-  return matchstr(a:channel, '\d\+')
+  return ch_info(a:channel)['id']
 endfunction