diff --git a/app/models/commercial.rb b/app/models/commercial.rb
index 49d09b95a..c62a34ab9 100644
--- a/app/models/commercial.rb
+++ b/app/models/commercial.rb
@@ -74,6 +74,8 @@ def self.read_file(file)
   private
 
   def valid_url
+    return unless url
+
     result = Commercial.render_from_url(url)
     errors.add(:base, result[:error]) if result[:error]
   end