Update runtime files.
diff --git a/runtime/syntax/systemd.vim b/runtime/syntax/systemd.vim
new file mode 100644
index 0000000..5dfba74
--- /dev/null
+++ b/runtime/syntax/systemd.vim
@@ -0,0 +1,8 @@
+" Vim syntax file
+" Language:  systemd.unit(5)
+
+if !exists('b:current_syntax')
+  " Looks a lot like dosini files.
+  runtime! syntax/dosini.vim
+  let b:current_syntax = 'systemd'
+endif