diff --git a/scanner/signaler_unix.go b/scanner/signaler_unix.go
index ee75d1f5c..cdf54acd6 100644
--- a/scanner/signaler_unix.go
+++ b/scanner/signaler_unix.go
@@ -1,4 +1,5 @@
-// +build !windows !plan9
+// +build !windows
+// +build !plan9
 
 package scanner