diff --git a/rtmp/rtmp_headers.go b/rtmp/rtmp_headers.go
index d7162615..c9985361 100644
--- a/rtmp/rtmp_headers.go
+++ b/rtmp/rtmp_headers.go
@@ -248,7 +248,7 @@ type C_RTMP struct {
 	m_polling              int32
 	m_resplen              int32
 	m_unackd               int32
-	m_clientID             C_AVal
+	m_clientID             string
 	m_read                 C_RTMP_READ
 	m_write                C_RTMPPacket
 	m_sb                   C_RTMPSockBuf