diff --git a/rtmp/rtmp.go b/rtmp/rtmp.go
index d6cde7b6..b20c40d8 100644
--- a/rtmp/rtmp.go
+++ b/rtmp/rtmp.go
@@ -372,8 +372,6 @@ type C_AMFObject struct {
 	o_props *C.AMFObjectProperty
 }
 
-var _ Session = (*session)(nil)
-
 // NewSession returns a new session.
 func NewSession(url string, connectTimeout uint) Session {
 	return &session{