From 27e9143b5149b05a3509695b99a13c3bb0750357 Mon Sep 17 00:00:00 2001
From: Ken Chapple <ken.chapple@gmail.com>
Date: Tue, 16 Mar 2021 11:00:55 -0400
Subject: [PATCH] Added required singleton

---
 lib/util/counter.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/util/counter.rb b/lib/util/counter.rb
index 9d476f81..b13c5c62 100644
--- a/lib/util/counter.rb
+++ b/lib/util/counter.rb
@@ -1,3 +1,5 @@
+require 'singleton'
+
 module HQMF
   # Simple class to issue monotonically increasing integer identifiers
   class InstanceCounter