diff --git a/django/contrib/comments/templates/comments/form.html b/django/contrib/comments/templates/comments/form.html
index 5c43c62298..4861243745 100644
--- a/django/contrib/comments/templates/comments/form.html
+++ b/django/contrib/comments/templates/comments/form.html
@@ -13,7 +13,7 @@
     {% endif %}
   {% endfor %}
   <p class="submit">
-    <input type="submit" name="submit" class="submit-post" value="Post">
-    <input type="submit" name="submit" class="submit-preview" value="Preview">
+    <input type="submit" name="submit" class="submit-post" value="Post" />
+    <input type="submit" name="submit" class="submit-preview" value="Preview" />
   </p>
-</form>
\ No newline at end of file
+</form>