diff --git a/app/Rules/UniqueNumber.php b/app/Rules/UniqueNumber.php
index 3490295d..f85a6d57 100644
--- a/app/Rules/UniqueNumber.php
+++ b/app/Rules/UniqueNumber.php
@@ -61,6 +61,6 @@ class UniqueNumber implements Rule
     public function message()
     {
         $type = str_replace('_', ' ', $this->type);
-        return "{$type} already used.";
+        return "{$type} is already used.";
     }
 }