diff --git a/src/msmtp.c b/src/msmtp.c | |
index 3c21d2e..fc1d408 100644 | |
--- a/src/msmtp.c | |
+++ b/src/msmtp.c | |
@@ -78,6 +78,8 @@ extern int optind; | |
/* Default file names. */ | |
#ifdef W32_NATIVE | |
+#include <winsock2.h> | |
+ | |
#define SYSCONFFILE "msmtprc.txt" | |
#define USERCONFFILE "msmtprc.txt" | |
#define SYSNETRCFILE "netrc.txt" |