diff --git a/src/classes/repositories/class-tainacan-collections.php b/src/classes/repositories/class-tainacan-collections.php
index 21c800cda..9d94a243f 100644
--- a/src/classes/repositories/class-tainacan-collections.php
+++ b/src/classes/repositories/class-tainacan-collections.php
@@ -201,7 +201,7 @@ class Collections extends Repository {
 	            'type'        => 'string',
 	            'description' => __( 'The status of collection comment, if is allowed, so is "open", or is "closed".', 'tainacan' ),
 		        'default'     => get_default_comment_status(Entities\Collection::get_post_type()),
-		        'validation' => v::optional(stringType()->in( [ 'open', 'closed' ] )),
+		        'validation' => v::optional(v::stringType()->in( [ 'open', 'closed' ] )),
 		    ]
 
 		] );
diff --git a/src/classes/repositories/class-tainacan-items.php b/src/classes/repositories/class-tainacan-items.php
index 238989c5f..df1a372de 100644
--- a/src/classes/repositories/class-tainacan-items.php
+++ b/src/classes/repositories/class-tainacan-items.php
@@ -113,7 +113,7 @@ class Items extends Repository {
 		        'type'        => 'string',
 		        'description' => __( 'The status of item comment, if is allowed, so is "open" or is "closed".', 'tainacan' ),
 		        'default'     => get_default_comment_status(Entities\Collection::get_post_type()),
-		        'validation' => v::optional(stringType()->in( [ 'open', 'closed' ] )),
+		        'validation' => v::optional(v::stringType()->in( [ 'open', 'closed' ] )),
 		    ]
 		] );
 	}