diff --git a/include/serial/impl/unix.h b/include/serial/impl/unix.h
index 88f8b025..a7985da3 100644
--- a/include/serial/impl/unix.h
+++ b/include/serial/impl/unix.h
@@ -35,6 +35,8 @@
  *
  */
 
+#if !defined(_WIN32)
+
 #ifndef SERIAL_IMPL_UNIX_H
 #define SERIAL_IMPL_UNIX_H
 
@@ -198,3 +200,5 @@ class serial::Serial::SerialImpl {
 }
 
 #endif // SERIAL_IMPL_UNIX_H
+
+#endif // !defined(_WIN32)