diff --git a/app/lib/sanitize_config.rb b/app/lib/sanitize_config.rb
index 882b59b79..4ec42d64b 100644
--- a/app/lib/sanitize_config.rb
+++ b/app/lib/sanitize_config.rb
@@ -27,7 +27,7 @@ class Sanitize
       return if node['href'].blank? || node.text.blank?
 
       class_list = node['class']&.split(/[\t\n\f\r ]/)
-      return if class_list && class_list.include?('mention') || class_list.include?('hashtag')
+      return if class_list && (class_list.include?('mention') || class_list.include?('hashtag'))
 
       # href matches link text verbatim?
       href = node['href']