diff --git a/event.go b/event.go
index 1d62595..a0102d9 100644
--- a/event.go
+++ b/event.go
@@ -85,7 +85,7 @@ func (e Event) String() string {
 //    http://man7.org/linux/man-pages/man7/inotify.7.html
 //
 // Under Darwin, DragonFlyBSD, FreeBSD, NetBSD, OpenBSD (kqueue) Sys() always
-// returns notify.Kevent value, which is defined as:
+// returns a non-nil *notify.Kevent value, which is defined as:
 //
 //   type Kevent struct {
 //     Kevent *syscall.Kevent_t // Kevent is a kqueue specific structure.
diff --git a/event_kqueue.go b/event_kqueue.go
index 5ebc90b..dafef45 100644
--- a/event_kqueue.go
+++ b/event_kqueue.go
@@ -84,10 +84,10 @@ func (e *event) Event() Event { return e.e }
 func (e *event) Path() string { return e.p }
 
 // Sys returns platform specific object describing reported event.
-func (e *event) Sys() interface{} { return e.kq }
+func (e *event) Sys() interface{} { return &e.kq }
 
 func isdir(ei EventInfo) (bool, error) {
-	return ei.Sys().(Kevent).FI.IsDir(), nil
+	return ei.Sys().(*Kevent).FI.IsDir(), nil
 }
 
 // Kevent represents a single event.