diff --git a/htdocs/categories/class/categorie.class.php b/htdocs/categories/class/categorie.class.php
index f632492a59d..18f13a44813 100644
--- a/htdocs/categories/class/categorie.class.php
+++ b/htdocs/categories/class/categorie.class.php
@@ -1294,7 +1294,7 @@ class Categorie extends CommonObject
 		if (is_numeric( $type )) {
 			// We want to reverse lookup
 			$map_type = array_flip( $this->MAP_ID );
-			$type = $map_type;
+			$type = $map_type[$type];
 			dol_syslog( get_class( $this ) . "::rechercher(): numeric types are deprecated, please use string instead",
 				LOG_WARNING );
 		}