diff --git a/autoload/ale/job.vim b/autoload/ale/job.vim
index 2909dab..2711e99 100644
--- a/autoload/ale/job.vim
+++ b/autoload/ale/job.vim
@@ -119,7 +119,7 @@ function! s:VimCloseCallback(channel) abort
     if job_status(l:job) is# 'dead'
         try
             if !empty(l:info) && has_key(l:info, 'exit_cb')
-                call ale#util#GetFunction(l:info.exit_cb)(l:job_id, l:info.exit_code)
+                call ale#util#GetFunction(l:info.exit_cb)(l:job_id, get(l:info, 'exit_code', 1))
             endif
         finally
             " Automatically forget about the job after it's done.