diff --git a/stream.go b/stream.go
index ed06d69a..5f342793 100644
--- a/stream.go
+++ b/stream.go
@@ -295,6 +295,9 @@ func (s *Stream) WriteSCTP(p []byte, ppi PayloadProtocolIdentifier) (int, error)
 	if s.association.isBlockWrite() {
 		s.writeLock.Unlock()
 	}
+	if err != nil {
+		n = 0
+	}
 	return n, err
 }