diff --git a/src/wp-includes/post-thumbnail-template.php b/src/wp-includes/post-thumbnail-template.php
index 2862bdc93c..2b95f4fb70 100644
--- a/src/wp-includes/post-thumbnail-template.php
+++ b/src/wp-includes/post-thumbnail-template.php
@@ -119,7 +119,7 @@ function get_the_post_thumbnail( $post = null, $size = 'post-thumbnail', $attr =
 	$post_thumbnail_id = get_post_thumbnail_id( $post );
 
 	/**
-	 * Filter the post thumbnail size.
+	 * Filters the post thumbnail size.
 	 *
 	 * @since 2.9.0
 	 *
@@ -163,7 +163,7 @@ function get_the_post_thumbnail( $post = null, $size = 'post-thumbnail', $attr =
 		$html = '';
 	}
 	/**
-	 * Filter the post thumbnail HTML.
+	 * Filters the post thumbnail HTML.
 	 *
 	 * @since 2.9.0
 	 *