diff --git a/post.php b/post.php
index bd1591d9..248b372c 100644
--- a/post.php
+++ b/post.php
@@ -983,7 +983,7 @@ if (isset($_POST['delete'])) {
 			if (!$size = @getimagesize($file['tmp_name'])) {
 				error($config['error']['invalidimg']);
 			}
-			if (!in_array($size[2], array(IMAGETYPE_PNG, IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_BMP))) {
+			if (!in_array($size[2], array(IMAGETYPE_PNG, IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_BMP, IMAGETYPE_WEBP))) {
 				error($config['error']['invalidimg']);
 			}
 			if ($size[0] > $config['max_width'] || $size[1] > $config['max_height']) {