diff --git a/install/thelia.sql b/install/thelia.sql
index d5b84f368..aa9a79d27 100644
--- a/install/thelia.sql
+++ b/install/thelia.sql
@@ -20,7 +20,9 @@ CREATE TABLE `category`
     `version` INTEGER DEFAULT 0,
     `version_created_at` DATETIME,
     `version_created_by` VARCHAR(100),
-    PRIMARY KEY (`id`)
+    PRIMARY KEY (`id`),
+    INDEX `idx_parent` (`parent`),
+    INDEX `idx_parent_position` (`parent`, `position`)
 ) ENGINE=InnoDB;
 
 -- ---------------------------------------------------------------------
diff --git a/local/config/schema.xml b/local/config/schema.xml
index 86a189bfe..a9013fa88 100644
--- a/local/config/schema.xml
+++ b/local/config/schema.xml
@@ -12,6 +12,13 @@
     <column name="meta_title" size="255" type="VARCHAR" />
     <column name="meta_description" type="LONGVARCHAR" />
     <column name="meta_keywords" type="LONGVARCHAR" />
+    <index name="idx_parent">
+      <index-column name="parent" />
+    </index>
+    <index name="idx_parent_position">
+      <index-column name="parent" />
+      <index-column name="position" />
+    </index>
     <behavior name="i18n">
       <parameter name="i18n_columns" value="title, description, chapo, postscriptum, meta_title, meta_description, meta_keywords" />
     </behavior>