diff --git a/libebur128.go b/libebur128.go
index 01cb141..bb355b7 100644
--- a/libebur128.go
+++ b/libebur128.go
@@ -179,5 +179,6 @@ func (s *State) AddShort(src []int16) error {
 func (s *State) Close() {
 	if s.p != nil {
 		C.ebur128_destroy(&s.p)
+		s.p = nil
 	}
 }