diff --git a/plugins/provisioners/shell/provisioner.rb b/plugins/provisioners/shell/provisioner.rb
index a1ef9aa04..42cbdb3fa 100644
--- a/plugins/provisioners/shell/provisioner.rb
+++ b/plugins/provisioners/shell/provisioner.rb
@@ -54,6 +54,7 @@ module VagrantPlugins
         begin
           file.write(config.inline)
           file.fsync
+          file.close
           yield file.path
         ensure
           file.close