diff --git a/TODO.rdoc b/TODO.rdoc
index 0d856858..d0cb7047 100644
--- a/TODO.rdoc
+++ b/TODO.rdoc
@@ -2,6 +2,8 @@
 
 * Sample CSS
 * Add default size support
+* HTML 5 support
+* Pretty buttons
 
 == Validations
 
diff --git a/lib/simple_form/form_builder.rb b/lib/simple_form/form_builder.rb
index 9e7b27ce..03a5499a 100644
--- a/lib/simple_form/form_builder.rb
+++ b/lib/simple_form/form_builder.rb
@@ -163,11 +163,13 @@ module SimpleForm
       end
 
       options[:collection] ||= begin
-        find_options = options.slice(:conditions, :order, :include, :joins)
+        finders = options.slice(:conditions, :order, :include, :joins)
+        finders[:conditions] = @reflection.klass.merge_conditions(finders[:conditions],
+          @reflection.options[:conditions])
         klass = Array(options[:scope]).inject(@reflection.klass) do |klass, scope|
           klass.send(scope)
         end
-        klass.all(find_options)
+        klass.all(finders)
       end
 
       returning(input(attribute, options)) { @reflection = nil }
diff --git a/test/form_builder_test.rb b/test/form_builder_test.rb
index 45fd63ff..b6eb55fd 100644
--- a/test/form_builder_test.rb
+++ b/test/form_builder_test.rb
@@ -462,6 +462,14 @@ class FormBuilderTest < ActionView::TestCase
     assert_no_select 'form select option[value=3]'
   end
 
+  test 'builder should use reflection conditions to find collection' do
+    with_association_for @user, :special_company
+    assert_select 'form select.select#user_special_company_id'
+    assert_select 'form select option[value=1]'
+    assert_no_select 'form select option[value=2]'
+    assert_no_select 'form select option[value=3]'
+  end
+
   test 'builder should allow passing order to find collection' do
     with_association_for @user, :company, :order => 'name'
     assert_select 'form select.select#user_company_id'
diff --git a/test/support/models.rb b/test/support/models.rb
index 7027d2a0..13de64ad 100644
--- a/test/support/models.rb
+++ b/test/support/models.rb
@@ -6,19 +6,23 @@ Association = Struct.new(:klass, :name, :macro, :options)
 class Company < Struct.new(:id, :name)
   def self.all(options={})
     all = (1..3).map{|i| Company.new(i, "Company #{i}")}
-    return [all.first] if options[:conditions]
-    return [all.last]  if options[:order]
-    return all[0..1] if options[:include]
-    return all[1..2] if options[:joins]
+    return [all.first] if options[:conditions].present?
+    return [all.last]  if options[:order].present?
+    return all[0..1] if options[:include].present?
+    return all[1..2] if options[:joins].present?
     all
   end
 
+  def self.merge_conditions(a, b)
+    (a || {}).merge(b || {})
+  end
+
   def new_record?
     false
   end
 end
 
-class Tag < Struct.new(:id, :name)
+class Tag < Company
   def self.all(options={})
     (1..3).map{|i| Tag.new(i, "Tag #{i}")}
   end
@@ -79,6 +83,8 @@ class User < OpenStruct
         Association.new(Tag, association, :has_many, {})
       when :first_company
         Association.new(Company, association, :has_one, {})
+      when :special_company
+        Association.new(Company, association, :belongs_to, { :conditions => { :id => 1 } })
     end
   end