diff --git a/stream/flv/encoder.go b/stream/flv/encoder.go
index 4772a151..46d0eacb 100644
--- a/stream/flv/encoder.go
+++ b/stream/flv/encoder.go
@@ -73,6 +73,9 @@ func NewEncoder(dst io.Writer, audio, video bool, fps int) (*Encoder, error) {
 		video: video,
 	}
 	_, err := dst.Write(e.HeaderBytes())
+	if err != nil {
+		return nil, err
+	}
 	return &e, err
 }