diff --git a/inc/mod/pages.php b/inc/mod/pages.php
index 36dec7bb..ab2fb2d3 100644
--- a/inc/mod/pages.php
+++ b/inc/mod/pages.php
@@ -1571,7 +1571,7 @@ function mod_spoiler_image($board, $post, $file) {
 	$size_spoiler_image = @getimagesize($config['spoiler_image']);
 	file_unlink($board . '/' . $config['dir']['thumb'] . $files[$file]->thumb);
 	$files[$file]->thumb = 'spoiler';
-	$files[$file]->thumbwidth = $size_spoiler[0];
+	$files[$file]->thumbwidth = $size_spoiler_image[0];
 	$files[$file]->thumbheight = $size_spoiler_image[1];
 	
 	// Make thumbnail spoiler