diff --git a/lib/config.dos b/lib/config.dos
index de751da1280710b1d2bed1c40e35b151a9d17193..db9e4220c9c41ee7d304336a1d1b6715b2a8b99f 100644
--- a/lib/config.dos
+++ b/lib/config.dos
@@ -20,6 +20,7 @@
 #define HAVE_ARPA_INET_H       1
 #define HAVE_FCNTL_H           1
 #define HAVE_FIONBIO           1
+#define HAVE_GETADDRINFO       1
 #define HAVE_GETPROTOBYNAME    1
 #define HAVE_GETTIMEOFDAY      1
 #define HAVE_IO_H              1