diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 2f0b8a2..8627c89 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -156,6 +156,7 @@
 
 /* New file descriptors */
 cond_syscall(sys_signalfd);
+cond_syscall(sys_signalfd4);
 cond_syscall(compat_sys_signalfd);
 cond_syscall(sys_timerfd_create);
 cond_syscall(sys_timerfd_settime);