diff --git a/lib/datadog/tracing/contrib/mysql2/configuration/settings.rb b/lib/datadog/tracing/contrib/mysql2/configuration/settings.rb
index 9bcaecc4b37..04b097b23b7 100644
--- a/lib/datadog/tracing/contrib/mysql2/configuration/settings.rb
+++ b/lib/datadog/tracing/contrib/mysql2/configuration/settings.rb
@@ -52,8 +52,7 @@ class Settings < Contrib::Configuration::Settings
             end
 
             option :on_error do |o|
-              o.type :proc
-              o.default_proc(&Tracing::SpanOperation::Events::DEFAULT_ON_ERROR)
+              o.type :proc, nilable: true
             end
           end
         end