diff --git a/src/Controllers/Version4/AbstractObjectsController.php b/src/Controllers/Version4/AbstractObjectsController.php
index 0e85ba5af4a..160413d559f 100644
--- a/src/Controllers/Version4/AbstractObjectsController.php
+++ b/src/Controllers/Version4/AbstractObjectsController.php
@@ -191,7 +191,7 @@ abstract class AbstractObjectsController extends AbstractController {
 	 * @since  3.0.0
 	 * @param  \WP_REST_Request $request  Full details about the request.
 	 * @param  bool             $creating If is creating a new object.
-	 * @return WC_Data|\WP_Error
+	 * @return \WC_Data|\WP_Error
 	 */
 	protected function save_object( $request, $creating = false ) {
 		try {
@@ -531,7 +531,7 @@ abstract class AbstractObjectsController extends AbstractController {
 		 * Return false to disable trash support for the object.
 		 *
 		 * @param boolean $supports_trash Whether the object type support trashing.
-		 * @param WC_Data $object         The object being considered for trashing support.
+		 * @param \WC_Data $object         The object being considered for trashing support.
 		 */
 		return apply_filters( "woocommerce_rest_{$this->post_type}_object_trashable", $supports_trash, $object );
 	}
diff --git a/src/Controllers/Version4/Coupons.php b/src/Controllers/Version4/Coupons.php
index 6ba8c0c7118..1aa84341749 100644
--- a/src/Controllers/Version4/Coupons.php
+++ b/src/Controllers/Version4/Coupons.php
@@ -126,7 +126,7 @@ class Coupons extends AbstractObjectsController {
 	 *
 	 * @since  3.0.0
 	 * @param  int $id Object ID.
-	 * @return WC_Data
+	 * @return \WC_Data
 	 */
 	protected function get_object( $id ) {
 		return new \WC_Coupon( $id );
@@ -217,7 +217,7 @@ class Coupons extends AbstractObjectsController {
 		 * refers to object type being prepared for the response.
 		 *
 		 * @param \WP_REST_Response $response The response object.
-		 * @param WC_Data          $object   Object data.
+		 * @param \WC_Data          $object   Object data.
 		 * @param \WP_REST_Request  $request  Request object.
 		 */
 		return apply_filters( "woocommerce_rest_prepare_{$this->post_type}_object", $response, $object, $request );
@@ -306,7 +306,7 @@ class Coupons extends AbstractObjectsController {
 		 * The dynamic portion of the hook name, `$this->post_type`,
 		 * refers to the object type slug.
 		 *
-		 * @param WC_Data         $coupon   Object object.
+		 * @param \WC_Data         $coupon   Object object.
 		 * @param \WP_REST_Request $request  Request object.
 		 * @param bool            $creating If is creating a new object.
 		 */
diff --git a/src/Controllers/Version4/Customers.php b/src/Controllers/Version4/Customers.php
index f5fbe968727..4e0234b5138 100644
--- a/src/Controllers/Version4/Customers.php
+++ b/src/Controllers/Version4/Customers.php
@@ -228,7 +228,7 @@ class Customers extends AbstractController {
 	/**
 	 * Get formatted item data.
 	 *
-	 * @param WC_Data $object WC_Data instance.
+	 * @param \WC_Data $object WC_Data instance.
 	 *
 	 * @since  3.0.0
 	 * @return array
diff --git a/src/Controllers/Version4/Orders.php b/src/Controllers/Version4/Orders.php
index a082444c830..57e76a2916e 100644
--- a/src/Controllers/Version4/Orders.php
+++ b/src/Controllers/Version4/Orders.php
@@ -321,7 +321,7 @@ class Orders extends AbstractObjectsController {
 	/**
 	 * Prepare links for the request.
 	 *
-	 * @param WC_Data          $object  Object data.
+	 * @param \WC_Data          $object  Object data.
 	 * @param \WP_REST_Request $request Request object.
 	 * @return array                   Links for the given post.
 	 */
diff --git a/src/Controllers/Version4/Products.php b/src/Controllers/Version4/Products.php
index 9b011dcb6cf..a81187c2d45 100644
--- a/src/Controllers/Version4/Products.php
+++ b/src/Controllers/Version4/Products.php
@@ -586,7 +586,7 @@ class Products extends AbstractObjectsController {
 		 * The dynamic portion of the hook name, `$this->post_type`,
 		 * refers to the object type slug.
 		 *
-		 * @param WC_Data         $product  Object object.
+		 * @param \WC_Data         $product  Object object.
 		 * @param \WP_REST_Request $request  Request object.
 		 * @param bool            $creating If is creating a new object.
 		 */
@@ -1391,7 +1391,7 @@ class Products extends AbstractObjectsController {
 	/**
 	 * Clear caches here so in sync with any new variations/children.
 	 *
-	 * @param WC_Data $object Object data.
+	 * @param \WC_Data $object Object data.
 	 */
 	public function clear_transients( $object ) {
 		wc_delete_product_transients( $object->get_id() );
@@ -1439,7 +1439,7 @@ class Products extends AbstractObjectsController {
 		 * Return false to disable trash support for the object.
 		 *
 		 * @param boolean $supports_trash Whether the object type support trashing.
-		 * @param WC_Data $object         The object being considered for trashing support.
+		 * @param \WC_Data $object         The object being considered for trashing support.
 		 */
 		$supports_trash = apply_filters( "woocommerce_rest_{$this->post_type}_object_trashable", $supports_trash, $object );
 
@@ -1517,7 +1517,7 @@ class Products extends AbstractObjectsController {
 		/**
 		 * Fires after a single object is deleted or trashed via the REST API.
 		 *
-		 * @param WC_Data          $object   The deleted or trashed object.
+		 * @param \WC_Data          $object   The deleted or trashed object.
 		 * @param \WP_REST_Response $response The response data.
 		 * @param \WP_REST_Request  $request  The request sent to the API.
 		 */