diff --git a/lib/antivirus/clamav/classes/scanner.php b/lib/antivirus/clamav/classes/scanner.php
index 2d0b7af6316..047cb49525b 100644
--- a/lib/antivirus/clamav/classes/scanner.php
+++ b/lib/antivirus/clamav/classes/scanner.php
@@ -28,7 +28,7 @@ defined('MOODLE_INTERNAL') || die();
 
 /** Default socket timeout */
 define('ANTIVIRUS_CLAMAV_SOCKET_TIMEOUT', 10);
-/** Default socket data stream chunk size (32Mb: 32*1024*"024) */
+/** Default socket data stream chunk size (32Mb: 32 * 1024 * 1024) */
 define('ANTIVIRUS_CLAMAV_SOCKET_CHUNKSIZE', 33554432);
 
 /**