diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index ad261ea81f..3287814279 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -1993,7 +1993,7 @@ en:
     forwarded_emails_behaviour: "How to treat a forwarded email to Discourse"
     always_show_trimmed_content: "Always show trimmed part of incoming emails. WARNING: might reveal email addresses."
     private_email: "Don't include content from posts or topics in email title or email body. NOTE: also disables digest emails."
-    email_total_attachment_size_limit_kb: "Max total size of files attached to outgoing emails. Set to 0 to disable sending of attachments."
+    email_total_attachment_size_limit_kb: "Max total size of files attached to outgoing emails in kB. Set to 0 to disable sending of attachments."
     post_excerpts_in_emails: "In notification emails, always send excerpts instead of full posts"
     raw_email_max_length: "How many characters should be stored for incoming email."
     raw_rejected_email_max_length: "How many characters should be stored for rejected incoming email."