diff --git a/microsoft_kb/microsoft_kb_checker.rb b/microsoft_kb/microsoft_kb_checker.rb
index 74887bc..69d47a2 100644
--- a/microsoft_kb/microsoft_kb_checker.rb
+++ b/microsoft_kb/microsoft_kb_checker.rb
@@ -81,7 +81,7 @@ class MicrosoftKbChecker
   def find_os
     if AVAILABLE_OS.include?(os)
       response = make_request
-      json_data = parse_json(response)
+      parse_json(response)
     else
       'Operating system not found.'
     end