diff --git a/db/migrate/20120822195841_set_first_notice_at_on_problems.rb b/db/migrate/20120822195841_set_first_notice_at_on_problems.rb
new file mode 100644
index 0000000..a81bbec
--- /dev/null
+++ b/db/migrate/20120822195841_set_first_notice_at_on_problems.rb
@@ -0,0 +1,10 @@
+class SetFirstNoticeAtOnProblems < Mongoid::Migration
+  def self.up
+    Problem.all.each do |problem|
+      problem.update_attribute :first_notice_at, problem.notices.order_by([:created_at, :asc]).first.try(:created_at)
+    end
+  end
+
+  def self.down
+  end
+end
\ No newline at end of file
--
libgit2 0.21.2