diff --git a/configure.ac b/configure.ac
index 1817606..16ced7a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -298,6 +298,9 @@
 AC_CHECK_HEADERS([stdlib.h])
 AC_CHECK_HEADERS([sys/socket.h])
 AC_CHECK_HEADERS([sys/time.h])
+AC_CHECK_HEADERS([sys/un.h])
+AC_CHECK_HEADERS([sys/poll.h])
+AC_CHECK_HEADERS([sys/resource.h])
 AC_CHECK_HEADERS([unistd.h])
 AC_CHECK_HEADERS([libintl.h])
 AC_CHECK_HEADERS([malloc.h])