diff --git a/plugin/foreplay.vim b/plugin/foreplay.vim
index 4cf0b3d..1e93827 100644
--- a/plugin/foreplay.vim
+++ b/plugin/foreplay.vim
@@ -916,7 +916,7 @@ function! s:leiningen_connect()
   endif
   let portfile = b:leiningen_root . '/target/repl-port'
   if getfsize(portfile) > 0 && getftime(portfile) !=# get(s:leiningen_repl_ports, b:leiningen_root, -1)
-    let port = readfile(portfile, 'b', 1)[0]
+    let port = matchstr(readfile(portfile, 'b', 1)[0], '\d\+')
     let s:leiningen_repl_ports[b:leiningen_root] = getftime(portfile)
     try
       call s:register_connection(nrepl#foreplay_connection#open(port), b:leiningen_root)