diff --git a/app/models/query.rb b/app/models/query.rb
index f25b5c40..c19bb8d7 100644
--- a/app/models/query.rb
+++ b/app/models/query.rb
@@ -227,7 +227,7 @@ class Query < ActiveRecord::Base
   end
   
   def label_for(field)
-    label = @available_filters[field][:name] if @available_filters.has_key?(field)
+    label = available_filters[field][:name] if available_filters.has_key?(field)
     label ||= field.gsub(/\_id$/, "")
   end
 
diff --git a/test/unit/query_test.rb b/test/unit/query_test.rb
index e143e6fc..147bfbea 100644
--- a/test/unit/query_test.rb
+++ b/test/unit/query_test.rb
@@ -116,6 +116,11 @@ class QueryTest < Test::Unit::TestCase
     assert q.has_column?(c)
   end
   
+  def test_label_for
+    q = Query.new
+    assert_equal 'assigned_to', q.label_for('assigned_to_id')
+  end
+  
   def test_editable_by
     admin = User.find(1)
     manager = User.find(2)