diff --git a/lib/endpoints/class-wp-rest-comments-controller.php b/lib/endpoints/class-wp-rest-comments-controller.php
index 1ac353435c..26d99ff648 100755
--- a/lib/endpoints/class-wp-rest-comments-controller.php
+++ b/lib/endpoints/class-wp-rest-comments-controller.php
@@ -741,7 +741,8 @@ public function get_item_schema() {
 		foreach ( $avatar_sizes as $size ) {
 			$avatar_properties[ $size ] = array(
 				'description' => 'Avatar URL with image size of ' . $size . ' pixels.',
-				'type'        => 'uri',
+				'type'        => 'string',
+				'format'      => 'uri',
 				'context'     => array( 'embed', 'view', 'edit' ),
 			);
 		}
diff --git a/lib/endpoints/class-wp-rest-users-controller.php b/lib/endpoints/class-wp-rest-users-controller.php
index e54b39b9ec..ed1c3533f8 100755
--- a/lib/endpoints/class-wp-rest-users-controller.php
+++ b/lib/endpoints/class-wp-rest-users-controller.php
@@ -629,7 +629,8 @@ public function get_item_schema() {
 		foreach ( $avatar_sizes as $size ) {
 			$avatar_properties[ $size ] = array(
 				'description' => 'Avatar URL with image size of ' . $size . ' pixels.',
-				'type'        => 'uri',
+				'type'        => 'string',
+				'format'      => 'uri',
 				'context'     => array( 'embed', 'view', 'edit' ),
 			);
 		}