diff --git a/unixcreds.go b/unixcreds_linux.go
similarity index 98%
rename from unixcreds.go
rename to unixcreds_linux.go
index 23eb358..60667e1 100644
--- a/unixcreds.go
+++ b/unixcreds_linux.go
@@ -1,5 +1,3 @@
-// +build linux freebsd solaris
-
 package ttrpc
 
 import (