diff --git a/src/system.h b/src/system.h
index 70acdfd..45236f1 100644
--- a/src/system.h
+++ b/src/system.h
@@ -118,8 +118,10 @@
 
 #ifndef HAVE_BACKEND
 #define USE_SELECT
+#ifndef WINSOCK
 #include <sys/select.h>
 #endif
+#endif
 
 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__)
 #undef HAVE_STRNDUP