diff --git a/sys/kern/kern_event.c b/sys/kern/kern_event.c
--- a/sys/kern/kern_event.c
+++ b/sys/kern/kern_event.c
@@ -1057,6 +1057,19 @@
 	return (kern_kqueue(td, 0, NULL));
 }
 
+int
+sys_kqueue1(struct thread *td, struct kqueue1_args *uap)
+{
+	int flags;
+
+	if ((uap->flags & ~(KQUEUE_CLOEXEC)) != 0)
+		return (EINVAL);
+	flags = 0;
+	if ((uap->flags & KQUEUE_CLOEXEC) != 0)
+		flags |= O_CLOEXEC;
+	return (kern_kqueue(td, flags, NULL));
+}
+
 static void
 kqueue_init(struct kqueue *kq)
 {
diff --git a/sys/kern/syscalls.master b/sys/kern/syscalls.master
--- a/sys/kern/syscalls.master
+++ b/sys/kern/syscalls.master
@@ -3306,5 +3306,10 @@
 		    u_int flags,
 		);
 	}
+583	AUE_KQUEUE	STD|CAPENABLED {
+		int kqueue1(
+		    u_int flags
+		);
+	}
 
 ; vim: syntax=off
diff --git a/sys/sys/event.h b/sys/sys/event.h
--- a/sys/sys/event.h
+++ b/sys/sys/event.h
@@ -218,6 +218,9 @@
 #define NOTE_NSECONDS		0x00000008	/* data is nanoseconds */
 #define	NOTE_ABSTIME		0x00000010	/* timeout is absolute */
 
+/* Flags for kqueue1(2) */
+#define	KQUEUE_CLOEXEC	0x00000001	/* close on exec */
+
 struct knote;
 SLIST_HEAD(klist, knote);
 struct kqueue;