diff --git a/lib/bugsnag/configuration.rb b/lib/bugsnag/configuration.rb
index c5a919430..e317e43c9 100644
--- a/lib/bugsnag/configuration.rb
+++ b/lib/bugsnag/configuration.rb
@@ -37,7 +37,6 @@ class Configuration
     attr_accessor :runtime_versions
     attr_accessor :ignore_classes
     attr_accessor :auto_capture_sessions
-    attr_accessor :track_sessions
 
     ##
     # @return [String] URL error notifications will be delivered to