diff --git a/base/blocks.php b/base/blocks.php
index 6127c7f5cbad81d1b6ad9002047c57322692b2d7..6bd3092f858c3b99d646da3a49f5c6aee41f50c5 100644
--- a/base/blocks.php
+++ b/base/blocks.php
@@ -97,7 +97,7 @@ function blocks_declarer_tables_objets_sql($tables) {
 		],
 		'key'                 => [
 			'PRIMARY KEY'     => 'id_blocs_type',
-			'KEY identifiant' => 'identifiant',
+			'UNIQUE KEY identifiant' => 'identifiant',
 		],
 		'titre'               => 'titre AS titre, "" AS lang',
 		#'date' => '',