diff --git a/lib/generators/templates/db/seeds/image_rotators.rb b/lib/generators/templates/db/seeds/image_rotators.rb
index 2b4f146..0f186b2 100644
--- a/lib/generators/templates/db/seeds/image_rotators.rb
+++ b/lib/generators/templates/db/seeds/image_rotators.rb
@@ -1,4 +1,8 @@
-User.find(:all).each do |user|
-  user.plugins.create(:name => "image_rotators",
-                      :position => (user.plugins.maximum(:position) || -1) +1)
+if defined?(::User)
+  User.find(:all).each do |user|
+    if user.plugins.where(:name => 'image_rotators').blank?
+      user.plugins.create(:name => "image_rotators",
+                          :position => (user.plugins.maximum(:position) || -1) +1)
+    end
+  end
 end