diff --git a/configure.in b/configure.in
index d0c7a30..ba47c63 100644
--- a/configure.in
+++ b/configure.in
@@ -367,7 +367,11 @@ AC_CHECK_TYPE(socklen_t,
     [[$ac_includes_default]
     [#ifdef HAVE_NETDB_H]
     [#include <netdb.h>]
-    [#endif]]
+    [#endif]
+    [#ifdef HAVE_NETINET_IN_H]
+    [#include <netinet/in.h>]
+    [#endif]
+    ]
 )