diff --git a/app/controllers/ad_banners_controller.rb b/app/controllers/ad_banners_controller.rb
index 08fdca7..f6499af 100644
--- a/app/controllers/ad_banners_controller.rb
+++ b/app/controllers/ad_banners_controller.rb
@@ -27,6 +27,7 @@ class AdBannersController < ApplicationController
           "target" => target
         }
     end
+    base_image = adbanner.base_image.nil? ? 1 : adbanner.base_image
     {
       "extras" => {
         "ad_fx" => adbanner.ad_fx,
@@ -34,7 +35,7 @@ class AdBannersController < ApplicationController
         "title" => adbanner.title,
         "banner-height" => adbanner.height,
         "banner-width" => adbanner.width,
-        "base_image" => (adbanner.base_image - 1),
+        "base_image" => (base_image - 1),
         "timeout" => (adbanner.timeout * 1000),
         "more" => "More"
         },