diff --git a/syslogger.go b/syslogger.go
index 155029e9..3e54c4ac 100644
--- a/syslogger.go
+++ b/syslogger.go
@@ -1,6 +1,6 @@
 package xorm
 
-// +build !windows !nacl !plan9
+// +build !windows,!nacl,!plan9
 
 import (
 	"fmt"