@@ -64,10 +64,14 @@
 
 test x"$have_asprintf" != x"yes" -a x"$ac_cv_snprintf_useful_ret" != x"yes" && \
 	AC_MSG_ERROR(No asprintf and no snprintf returning required space!)
 
 ACX_PTHREAD
+
+AC_CHECK_LIB(ws2_32, main,
+	AC_SUBST(WS2_LIBS, "-lws2_32"),
+	AC_SUBST(WS2_LIBS, ""))
 
 AC_MSG_CHECKING(whether we have IPv6 support)
 AC_CACHE_VAL(ac_cv_have_ipv6, [
 	AC_TRY_RUN([
 		#include <stdlib.h>