diff --git a/plugin/fireplace.vim b/plugin/fireplace.vim
index 662d4f3..c75359b 100644
--- a/plugin/fireplace.vim
+++ b/plugin/fireplace.vim
@@ -215,7 +215,7 @@ endfunction
 
 function! s:Connect(...)
   if (a:0 ? a:1 : '') =~# '^\w\+://'
-    let [proto, arg] = split(a:arg, '://')
+    let [proto, arg] = split(a:1, '://')
   elseif a:0
     return 'echoerr '.string('Usage: :Connect proto://...')
   else