diff --git a/lib/overhead_timesheet_hook.rb b/lib/overhead_timesheet_hook.rb
index 32dc57b..d8bc160 100644
--- a/lib/overhead_timesheet_hook.rb
+++ b/lib/overhead_timesheet_hook.rb
@@ -22,6 +22,11 @@ class OverheadTimesheetHook < Redmine::Hook::ViewListener
 
   # Added a new field for filtering based on "billable?"
   def plugin_timesheet_views_timesheet_form(context={})
-    context[:controller].send(:render_to_string, :partial => 'timesheet/overhead_form', :layout => false)
+    context[:controller].send(:render_to_string,
+                              :partial => 'timesheet/overhead_form',
+                              :layout => false,
+                              :locals => {
+                                :list_size => context[:list_size] || 5
+                              })
   end
 end
diff --git a/spec/lib/overhead_timesheet_hook_spec.rb b/spec/lib/overhead_timesheet_hook_spec.rb
index fa6b6f2..af59514 100644
--- a/spec/lib/overhead_timesheet_hook_spec.rb
+++ b/spec/lib/overhead_timesheet_hook_spec.rb
@@ -58,6 +58,10 @@ describe OverheadTimesheetHook, "#plugin_timesheet_views_timesheet_form", :type
     response.should have_tag('label[class=?][for=?]', 'select_all', 'timesheet[billable][]')
   end
 
-  it 'should add a multple select field called "billable"'
+  it 'should add a multple select field called "billable"' do
+    response = call_hook(:plugin_timesheet_views_timesheet_form, {})
+    response.should have_tag('select[name=?][multiple=multiple]', 'timesheet[billable][]')
+  end
+
   it 'should pre-select the values from the submission'
 end