diff --git a/templates/forms/OptionsetField.ss b/templates/forms/OptionsetField.ss
index aa3f4cc5e..70012bb6f 100644
--- a/templates/forms/OptionsetField.ss
+++ b/templates/forms/OptionsetField.ss
@@ -1,7 +1,7 @@
 <ul $AttributesHTML>
 	<% loop $Options %>
 		<li class="$Class">
-			<input id="$ID" class="radio" name="$Name" type="radio" value="$Value"<% if $isChecked %> checked<% end_if %><% if $isDisabled %> disabled<% end_if %> />
+			<input id="$ID" class="radio" name="$Name" type="radio" value="$Value"<% if $isChecked %> checked<% end_if %><% if $isDisabled %> disabled<% end_if %> <% if $Up.Required %>required<% end_if %> />
 			<label for="$ID">$Title</label>
 		</li>
 	<% end_loop %>