diff --git a/libretroshare/src/pgp/pgphandler.cc b/libretroshare/src/pgp/pgphandler.cc
index c31e77363..48b250c7d 100644
--- a/libretroshare/src/pgp/pgphandler.cc
+++ b/libretroshare/src/pgp/pgphandler.cc
@@ -7,6 +7,7 @@
 #include <sys/stat.h>
 
 #ifdef WINDOWS_SYS
+#include <io.h>
 #include "util/rsstring.h"
 #include "util/rswin.h"
 #endif