diff --git a/spec/message_delivery_error_spec.rb b/spec/message_delivery_error_spec.rb
index 4b51591d..8595b98a 100644
--- a/spec/message_delivery_error_spec.rb
+++ b/spec/message_delivery_error_spec.rb
@@ -7,6 +7,7 @@
     Rdkafka::Producer::DeliveryHandle.new.tap do |dh|
       dh[:partition] = 37
       dh[:offset] = 42
+      dh[:topic_name] = FFI::MemoryPointer.from_string("produce_test_topic")
     end
   end