diff --git a/configure.in b/configure.in
index cf32d04f5ddacfc61f076a95d67643eb54eb3be1..8eeea1938801088bd1ee5ea995aa102c52d41058 100644
--- a/configure.in
+++ b/configure.in
@@ -369,7 +369,7 @@ AC_CHECK_SIZEOF(void *)
 AC_CHECK_SIZEOF(time_t)
 AC_CHECK_SIZEOF(size_t)
 
-AC_CHECK_TYPES([uint, u_char])
+AC_CHECK_TYPES([uint, u_char, ssize_t])
 
 AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, struct sockaddr_storage, sa_family_t], , ,
 [#ifdef HAVE_SYS_TYPES_H