diff --git a/templates/register.htm b/templates/register.htm
index e3a4425..9f55338 100644
--- a/templates/register.htm
+++ b/templates/register.htm
@@ -506,8 +506,11 @@
 
     <div class="form-outline mb-3">
         <label class="form-label fw-bold" for="conference_dinner">Conference Dinner</label>
+        <div id="dinnerHelp2" class="form-text">
+            <?php if ($dinners_left > 0) echo "$dinners_left places left"; else echo "Sorry, already fully booked"; ?>.
+        </div>
         <div class="form-group form-check">
-            <input type="checkbox" class="form-check-input" name="conference_dinner" id="conference_dinner" <?php echo isset($_POST[ 'conference_dinner']) ? 'checked' : '' ?> oninput="update_total_due()" value="conference_dinner">
+            <input <?php if ($dinners_left <=0) echo "disabled"; ?> type="checkbox" class="form-check-input" name="conference_dinner" id="conference_dinner" <?php echo isset($_POST[ 'conference_dinner']) ? 'checked' : '' ?> oninput="update_total_due()" value="conference_dinner">
             <label class="form-check-label fs-4" for="conference_dinner">I will be attending the <a href="#"  data-container="body" style="text-decoration: underline; color: black; cursor: help;" html="true" data-bs-html="true" data-bs-toggle="tooltip" title="
                 <h1>ICLC-10 Conference Dinner (Buffet)</h1>
                  <h2>Starters</h2>