diff --git a/app/models/pool.rb b/app/models/pool.rb
index 63ad094b6..56c050f94 100644
--- a/app/models/pool.rb
+++ b/app/models/pool.rb
@@ -18,6 +18,10 @@ class Pool < ActiveRecord::Base
   attr_accessible :is_deleted, :as => [:janitor, :moderator, :admin]
 
   module SearchMethods
+    def deleted
+      where("is_deleted = true")
+    end
+
     def undeleted
       where("is_deleted = false")
     end
@@ -193,7 +197,7 @@ class Pool < ActiveRecord::Base
     return if is_deleted?
 
     update_attributes(:post_ids => add_number_to_string(post.id, post_ids), :post_count => post_count + 1)
-    post.add_pool!(self)
+    post.add_pool!(self, true)
     clear_post_id_array
   end
 
@@ -202,7 +206,7 @@ class Pool < ActiveRecord::Base
     return if is_deleted?
 
     update_attributes(:post_ids => remove_number_from_string(post.id, post_ids), :post_count => post_count - 1)
-    post.remove_pool!(self)
+    post.remove_pool!(self, true)
     clear_post_id_array
   end
 
@@ -231,12 +235,12 @@ class Pool < ActiveRecord::Base
 
     added.each do |post_id|
       post = Post.find(post_id)
-      post.add_pool!(self)
+      post.add_pool!(self, true)
     end
 
     removed.each do |post_id|
       post = Post.find(post_id)
-      post.remove_pool!(self)
+      post.remove_pool!(self, true)
     end
 
     self.post_count = post_id_array.size
diff --git a/app/models/post.rb b/app/models/post.rb
index fc5946ec7..0b753eb9e 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -629,17 +629,17 @@ class Post < ActiveRecord::Base
       pool_string =~ /(?:\A| )pool:#{pool_id}(?:\Z| )/
     end
 
-    def add_pool!(pool)
+    def add_pool!(pool, force = false)
       return if belongs_to_pool?(pool)
-      return if pool.is_deleted?
+      return if pool.is_deleted? && !force
       self.pool_string = "#{pool_string} pool:#{pool.id}".strip
       update_column(:pool_string, pool_string) unless new_record?
       pool.add!(self)
     end
 
-    def remove_pool!(pool)
+    def remove_pool!(pool, force = false)
       return unless belongs_to_pool?(pool)
-      return if pool.is_deleted?
+      return if pool.is_deleted? && !force
       self.pool_string = pool_string.gsub(/(?:\A| )pool:#{pool.id}(?:\Z| )/, " ").strip
       update_column(:pool_string, pool_string) unless new_record?
       pool.remove!(self)
diff --git a/script/fixes/021_fix_deleted_pool_strings.rb b/script/fixes/021_fix_deleted_pool_strings.rb
new file mode 100644
index 000000000..d3cb8f0d0
--- /dev/null
+++ b/script/fixes/021_fix_deleted_pool_strings.rb
@@ -0,0 +1,14 @@
+#!/usr/bin/env ruby
+
+require File.expand_path(File.join(File.dirname(__FILE__), '..', '..', 'config', 'environment'))
+
+ActiveRecord::Base.connection.execute("set statement_timeout = 0")
+
+CurrentUser.user = User.admins.first
+CurrentUser.ip_addr = "127.0.0.1"
+
+Pool.deleted.where("post_count > 0").find_each do |pool|
+  Post.where("id in (?)", pool.post_id_array).tag_match("-pool:#{pool.id}").find_each do |post|
+    post.add_pool!(pool, true)
+  end
+end
diff --git a/test/unit/pool_test.rb b/test/unit/pool_test.rb
index 2e6d592c2..1195da53b 100644
--- a/test/unit/pool_test.rb
+++ b/test/unit/pool_test.rb
@@ -120,6 +120,29 @@ class PoolTest < ActiveSupport::TestCase
           assert_equal(1, @pool.post_count)
         end
       end
+
+      context "to a deleted pool" do
+        setup do
+          @pool.update_attribute(:is_deleted, true)
+          @pool.post_ids = "#{@pool.post_ids} #{@p2.id}"
+          @pool.synchronize!
+          @pool.save
+          @pool.reload
+          @p2.reload
+        end
+
+        should "add the post to the pool" do
+          assert_equal("#{@p1.id} #{@p2.id}", @pool.post_ids)
+        end
+
+        should "add the pool to the post" do
+          assert_equal("pool:#{@pool.id}", @p2.pool_string)
+        end
+
+        should "increment the post count" do
+          assert_equal(2, @pool.post_count)
+        end
+      end
     end
 
     context "by removing a post" do