diff --git a/listdir.php b/listdir.php
index 419aa48..43b2f4e 100644
--- a/listdir.php
+++ b/listdir.php
@@ -38,7 +38,7 @@ function do_filesize($path, $is_dir){
 	
 	if($filesize === 0){
 		
-		echo "0.00 B";
+		return "0.00 B";
 	}
 	
 	$s = ["B", "KB", "MB", "GB", "TB", "PB"];