diff --git a/db/migrate/099_add_delete_wiki_pages_attachments_permission.rb b/db/migrate/099_add_delete_wiki_pages_attachments_permission.rb
index 1ff888f3c..9fd986a3c 100644
--- a/db/migrate/099_add_delete_wiki_pages_attachments_permission.rb
+++ b/db/migrate/099_add_delete_wiki_pages_attachments_permission.rb
@@ -1,13 +1,13 @@
 class AddDeleteWikiPagesAttachmentsPermission < ActiveRecord::Migration
   def self.up
-	Role.find(:all).each do |r|
-	  r.add_permission!(:delete_wiki_pages_attachments) if r.has_permission?(:edit_wiki_pages)
-  	end
+    Role.find(:all).each do |r|
+      r.add_permission!(:delete_wiki_pages_attachments) if r.has_permission?(:edit_wiki_pages)
+    end
   end
 
   def self.down
-	Role.find(:all).each do |r|
-	  r.remove_permission!(:delete_wiki_pages_attachments)
-  	end
+    Role.find(:all).each do |r|
+      r.remove_permission!(:delete_wiki_pages_attachments)
+    end
   end
 end