diff --git a/syslog.go b/syslog.go
index ea6c1f0..9a3ebf7 100644
--- a/syslog.go
+++ b/syslog.go
@@ -1,3 +1,5 @@
+//+build !windows,!plan9
+
 package logger
 
 import "log/syslog"
diff --git a/syslog_fallback.go b/syslog_fallback.go
index 3aa90c2..ebc977e 100644
--- a/syslog_fallback.go
+++ b/syslog_fallback.go
@@ -1,3 +1,4 @@
+//+build windows plan9
 package logger
 
 import (