diff --git a/cf/roken-frag.m4 b/cf/roken-frag.m4
index 781e1d5ee..c54c7d3b7 100644
--- a/cf/roken-frag.m4
+++ b/cf/roken-frag.m4
@@ -430,7 +430,26 @@ AC_NEED_PROTO([#include <unistd.h>], gethostname)
 AC_NEED_PROTO([#include <unistd.h>], mkstemp)
 AC_NEED_PROTO([#include <unistd.h>], getusershell)
 AC_NEED_PROTO([#include <unistd.h>], daemon)
-AC_NEED_PROTO([#include <unistd.h>], iruserok)
+AC_NEED_PROTO([
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif],
+iruserok)
 
 AC_NEED_PROTO([
 #ifdef HAVE_SYS_TYPES_H