diff --git a/app/models/ad_image.rb b/app/models/ad_image.rb
index 911cf6e..4184073 100644
--- a/app/models/ad_image.rb
+++ b/app/models/ad_image.rb
@@ -73,9 +73,13 @@ class AdImage
   def youtube_thumb
     uri = URI.parse(self.youtube) rescue nil
     if !uri.nil? && uri.host == "www.youtube.com"
-      params = CGI.parse(uri.query)
-      v = params['v'].first
-      return "http://img.youtube.com/vi/#{v}/0.jpg"
+      params = CGI.parse(uri.query) rescue {}
+      if params.has_key?('v')
+        v = params['v'].first
+        return "http://img.youtube.com/vi/#{v}/0.jpg"
+      else
+        return ""
+      end
     else
       return ""
     end