diff --git a/lib/datadog/di/code_tracker.rb b/lib/datadog/di/code_tracker.rb
index 390bbb389b3..d0206f18586 100644
--- a/lib/datadog/di/code_tracker.rb
+++ b/lib/datadog/di/code_tracker.rb
@@ -19,7 +19,7 @@ class CodeTracker
       def initialize
         @registry = Hash.new
         @trace_point_lock = Mutex.new
-        @registry_lock = Hash.new
+        @registry_lock = {}
       end
 
       def start