diff --git a/plugins/custom_forms/lib/custom_forms_plugin/select_field.rb b/plugins/custom_forms/lib/custom_forms_plugin/select_field.rb
index f5577a9..7535094 100644
--- a/plugins/custom_forms/lib/custom_forms_plugin/select_field.rb
+++ b/plugins/custom_forms/lib/custom_forms_plugin/select_field.rb
@@ -4,5 +4,5 @@ class CustomFormsPlugin::SelectField < CustomFormsPlugin::Field
   validates_length_of :select_field_type, :minimum => 1, :allow_nil => false
   validates_inclusion_of :select_field_type, :in => %w(radio check_box select multiple_select)
 
-  validates_length_of :alternatives, :minimum => 1
+  validates_length_of :alternatives, :minimum => 1, :message => 'can\'t be empty'
 end
--
libgit2 0.21.2