diff --git a/src/wp-includes/class-wp-image-editor-gd.php b/src/wp-includes/class-wp-image-editor-gd.php
index 32f33dfa6e..72fb04ee72 100644
--- a/src/wp-includes/class-wp-image-editor-gd.php
+++ b/src/wp-includes/class-wp-image-editor-gd.php
@@ -334,8 +334,8 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
 	 *
 	 * @since 3.5.0
 	 *
-	 * @param bool $horz Flip along Horizontal Axis
-	 * @param bool $vert Flip along Vertical Axis
+	 * @param bool $horz Flip along Horizontal Axis.
+	 * @param bool $vert Flip along Vertical Axis.
 	 * @return true|WP_Error
 	 */
 	public function flip( $horz, $vert ) {