diff --git a/files/assets/js/comments.js b/files/assets/js/comments.js
index 4e73c91c3..35a06b460 100644
--- a/files/assets/js/comments.js
+++ b/files/assets/js/comments.js
@@ -39,4 +39,12 @@ function collapse_comment(id) {
 	const ta = document.getElementById('markdown-c_'+id);
 	if (ta && !ta.classList.contains('d-none'))
 		expandMarkdown(`c_${id}`)
+
+	if (closed) {
+		const children_count = document.getElementById(`replies-of-c_${id}`).getElementsByClassName('comment-body').length
+		document.getElementById(`children-count-${id}`).innerHTML = ` (${children_count} children)`
+	}
+	else {
+		document.getElementById(`children-count-${id}`).innerHTML = ''
+	}
 };
diff --git a/files/templates/comments.html b/files/templates/comments.html
index 669359ec5..4d13100c4 100644
--- a/files/templates/comments.html
+++ b/files/templates/comments.html
@@ -278,6 +278,8 @@
 							{% if c.blackjack_result %}
 								{{c.blackjack_html | safe}}
 							{% endif %}
+
+							<span id="children-count-{{c.id}}" class="vertical-align ml-1"></span>
 						</div>
 
 						{{macros.reports(c, 'comment')}}