diff --git a/lib/libc/sys/Symbol.map b/lib/libc/sys/Symbol.map
index 7984f54da697..7f6afd7b298b 100644
--- a/lib/libc/sys/Symbol.map
+++ b/lib/libc/sys/Symbol.map
@@ -419,6 +419,7 @@ FBSD_1.6 {
 FBSD_1.7 {
 	_Fork;
 	fspacectl;
+	kqueue1;
 	swapoff;
 };
 
diff --git a/sys/sys/event.h b/sys/sys/event.h
index e91ccbb31ae8..a2c0d481ebb2 100644
--- a/sys/sys/event.h
+++ b/sys/sys/event.h
@@ -361,6 +361,7 @@ struct timespec;
 
 __BEGIN_DECLS
 int     kqueue(void);
+int     kqueue1(unsigned flags);
 int     kevent(int kq, const struct kevent *changelist, int nchanges,
 	    struct kevent *eventlist, int nevents,
 	    const struct timespec *timeout);