diff --git a/src/activitypub/mocks.js b/src/activitypub/mocks.js
index d3c97f5da4..5d423e5625 100644
--- a/src/activitypub/mocks.js
+++ b/src/activitypub/mocks.js
@@ -303,7 +303,7 @@ Mocks.category = async (actors) => {
 			slug: `${preferredUsername}@${hostname}`,
 			description: summary,
 			descriptionParsed: posts.sanitize(activitypub.helpers.renderEmoji(summary || '', tag)),
-			icon: backgroundImage ? 'fa-none' : 'fa-comments',
+			icon: backgroundImage ? 'fa-nbb-none' : 'fa-comments',
 			color: '#fff',
 			bgColor,
 			backgroundImage,
diff --git a/src/categories/data.js b/src/categories/data.js
index c3a5ba9b1e..4f9afa7932 100644
--- a/src/categories/data.js
+++ b/src/categories/data.js
@@ -131,6 +131,9 @@ function modifyCategory(category, fields) {
 
 	if (hasField('icon')) {
 		category.icon = category.icon || 'hidden';
+		if (category.icon === 'fa-none') {
+			category.icon = 'fa-nbb-none';
+		}
 	}
 
 	if (hasField('post_count')) {