diff --git a/lib/simple_form/action_view_extensions/builder.rb b/lib/simple_form/action_view_extensions/builder.rb
index d560c20d..c632d366 100644
--- a/lib/simple_form/action_view_extensions/builder.rb
+++ b/lib/simple_form/action_view_extensions/builder.rb
@@ -307,7 +307,7 @@ module ActionView::Helpers
 
     def extract_selected_and_disabled_and_call_procs(selected, collection)
       selected, disabled = extract_selected_and_disabled selected
-      selected_disabled = { selected: selected, disabled: disabled }
+      selected_disabled = { :selected => selected, :disabled => disabled }
 
       selected_disabled.each do |key, check|
         if check.is_a? Proc