diff --git a/db/migrate/20091025163651_add_activity_indexes.rb b/db/migrate/20091025163651_add_activity_indexes.rb
new file mode 100644
index 000000000..f18059316
--- /dev/null
+++ b/db/migrate/20091025163651_add_activity_indexes.rb
@@ -0,0 +1,25 @@
+class AddActivityIndexes < ActiveRecord::Migration
+  def self.up
+    add_index :journals, :created_on
+    add_index :changesets, :committed_on
+    add_index :wiki_content_versions, :updated_on
+    add_index :messages, :created_on
+    add_index :issues, :created_on
+    add_index :news, :created_on
+    add_index :attachments, :created_on
+    add_index :documents, :created_on
+    add_index :time_entries, :created_on
+  end
+
+  def self.down
+    remove_index :journals, :created_on
+    remove_index :changesets, :committed_on
+    remove_index :wiki_content_versions, :updated_on
+    remove_index :messages, :created_on
+    remove_index :issues, :created_on
+    remove_index :news, :created_on
+    remove_index :attachments, :created_on
+    remove_index :documents, :created_on
+    remove_index :time_entries, :created_on
+  end
+end