diff --git a/serial_linux.go b/serial_linux.go
index afb3240..e084fd4 100644
--- a/serial_linux.go
+++ b/serial_linux.go
@@ -1,4 +1,4 @@
-// +build linux,!cgo
+// +build linux
 
 package serial
 
diff --git a/serial_posix.go b/serial_posix.go
index 607238a..d733f0f 100644
--- a/serial_posix.go
+++ b/serial_posix.go
@@ -1,4 +1,4 @@
-// +build !windows,cgo
+// +build !windows,!linux,cgo
 
 package serial