diff --git a/lib/ruby_llm/providers/openrouter/chat.rb b/lib/ruby_llm/providers/openrouter/chat.rb
index 0c3622bdf..6906d4380 100644
--- a/lib/ruby_llm/providers/openrouter/chat.rb
+++ b/lib/ruby_llm/providers/openrouter/chat.rb
@@ -52,7 +52,7 @@ def render_payload(messages, tools:, temperature:, model:, stream: false, schema
 
         def parse_completion_response(response)
           data = response.body
-          return if data.empty?
+          return if data.nil? || data.blank?
 
           raise Error.new(response, data.dig('error', 'message')) if data.dig('error', 'message')
 
diff --git a/spec/ruby_llm/providers/open_router/chat_spec.rb b/spec/ruby_llm/providers/open_router/chat_spec.rb
index be77c5f83..9f034716a 100644
--- a/spec/ruby_llm/providers/open_router/chat_spec.rb
+++ b/spec/ruby_llm/providers/open_router/chat_spec.rb
@@ -3,8 +3,9 @@
 require 'spec_helper'
 
 RSpec.describe RubyLLM::Providers::OpenRouter::Chat do
+  let(:model) { instance_double(RubyLLM::Model::Info, id: 'anthropic/claude-haiku-4.5') }
+
   describe '.render_payload' do
-    let(:model) { instance_double(RubyLLM::Model::Info, id: 'anthropic/claude-haiku-4.5') }
     let(:messages) { [RubyLLM::Message.new(role: :user, content: 'Hello')] }
 
     before do
@@ -63,4 +64,12 @@
       expect(payload[:response_format][:json_schema][:strict]).to be(false)
     end
   end
+
+  describe '.parse_completion_response' do
+    let(:response) { instance_double(Faraday::Response, body: nil) }
+
+    it "doesn't throw an error when response is nil" do
+      expect { described_class.parse_completion_response(response) }.not_to raise_error
+    end
+  end
 end