From 623cd381a473ec385f3d1e08a9a071fe6cfacd9a Mon Sep 17 00:00:00 2001
From: Hunter Madison <hunter.madison@instana.com>
Date: Tue, 29 Mar 2022 08:33:53 -0400
Subject: [PATCH] Check that Sinatra::Base is in scope before instrumentating

---
 lib/instana/activators/sinatra.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/instana/activators/sinatra.rb b/lib/instana/activators/sinatra.rb
index e66878b1..4dc94eb7 100644
--- a/lib/instana/activators/sinatra.rb
+++ b/lib/instana/activators/sinatra.rb
@@ -5,7 +5,7 @@ module Instana
   module Activators
     class Sinatra < Activator
       def can_instrument?
-        defined?(::Instana::Rack) && defined?(::Sinatra)
+        defined?(::Instana::Rack) && defined?(::Sinatra) && defined?(::Sinatra::Base)
       end
 
       def instrument