diff --git a/plugins/Blacklist/BlacklistPlugin.php b/plugins/Blacklist/BlacklistPlugin.php
index babf703131..58492d0dbb 100644
--- a/plugins/Blacklist/BlacklistPlugin.php
+++ b/plugins/Blacklist/BlacklistPlugin.php
@@ -510,7 +510,7 @@ class BlacklistPlugin extends Plugin
         if (!empty($nickname)) {
             if (!$this->_checkNickname($nickname)) {
                 // TRANS: Exception thrown trying to post a notice while having a blocked nickname. %s is the blocked nickname.
-                $msg = sprintf(_m("Notices from nickname \"%s\" disallowed."),
+                $msg = sprintf(_m("Notices from nickname \"%s\" are disallowed."),
                                $nickname);
                 throw new ClientException($msg);
             }