diff --git a/install/thelia.sql b/install/thelia.sql
index c20bbc8e2..b213c114f 100755
--- a/install/thelia.sql
+++ b/install/thelia.sql
@@ -984,6 +984,7 @@ CREATE TABLE `admin`
     `created_at` DATETIME,
     `updated_at` DATETIME,
     PRIMARY KEY (`id`),
+    UNIQUE INDEX `login_UNIQUE` (`login`),
     INDEX `idx_admin_profile_id` (`profile_id`),
     CONSTRAINT `fk_admin_profile_id`
         FOREIGN KEY (`profile_id`)
diff --git a/local/config/schema.xml b/local/config/schema.xml
index 6e547bd19..cc9c4c396 100755
--- a/local/config/schema.xml
+++ b/local/config/schema.xml
@@ -771,6 +771,9 @@
     <index name="idx_admin_profile_id">
       <index-column name="profile_id" />
     </index>
+    <unique name="login_UNIQUE">
+      <unique-column name="login" />
+    </unique>
     <behavior name="timestampable" />
   </table>
   <table isCrossRef="true" name="profile_resource" namespace="Thelia\Model">