diff --git a/lib/network.h b/lib/network.h
index ec43de197a..ab3a66aa8f 100644
--- a/lib/network.h
+++ b/lib/network.h
@@ -54,7 +54,11 @@ extern int get_socket_error(int fd);
 extern const char* socket_error_str();
 extern void reset_dns();
 
+#if defined(_WIN32) && !defined(__CYGWIN32__)
+typedef int BOINC_SOCKLEN_T;
+#else
 typedef socklen_t BOINC_SOCKLEN_T;
+#endif
 
 #if defined(_WIN32) && defined(USE_WINSOCK)
 extern int WinsockInitialize();