diff --git a/lib/new_relic/agent/llm/chat_completion_summary.rb b/lib/new_relic/agent/llm/chat_completion_summary.rb
index 4f64fc3cee..535f47c4a9 100644
--- a/lib/new_relic/agent/llm/chat_completion_summary.rb
+++ b/lib/new_relic/agent/llm/chat_completion_summary.rb
@@ -35,7 +35,8 @@ def attributes
         end
 
         def attribute_name_exceptions
-          LlmEvent::ATTRIBUTE_NAME_EXCEPTIONS.merge(ResponseHeaders::ATTRIBUTE_NAME_EXCEPTIONS, ATTRIBUTE_NAME_EXCEPTIONS)
+          # TODO: `merge` accepts *args once <Ruby 2.5 is dropped
+          LlmEvent::ATTRIBUTE_NAME_EXCEPTIONS.merge(ResponseHeaders::ATTRIBUTE_NAME_EXCEPTIONS).merge(ATTRIBUTE_NAME_EXCEPTIONS)
         end
 
         def event_name
diff --git a/lib/new_relic/agent/llm/embedding.rb b/lib/new_relic/agent/llm/embedding.rb
index 782dc786ce..f0dffbee02 100644
--- a/lib/new_relic/agent/llm/embedding.rb
+++ b/lib/new_relic/agent/llm/embedding.rb
@@ -25,7 +25,8 @@ def attributes
         end
 
         def attribute_name_exceptions
-          LlmEvent::ATTRIBUTE_NAME_EXCEPTIONS.merge(ResponseHeaders::ATTRIBUTE_NAME_EXCEPTIONS, ATTRIBUTE_NAME_EXCEPTIONS)
+          # TODO: `merge` accepts *args once <Ruby 2.5 is dropped
+          LlmEvent::ATTRIBUTE_NAME_EXCEPTIONS.merge(ResponseHeaders::ATTRIBUTE_NAME_EXCEPTIONS).merge(ATTRIBUTE_NAME_EXCEPTIONS)
         end
 
         def event_name