diff --git a/trunk/src/kernel/srs_kernel_codec.cpp b/trunk/src/kernel/srs_kernel_codec.cpp
index 2e8aec2a0..86f5aaaca 100644
--- a/trunk/src/kernel/srs_kernel_codec.cpp
+++ b/trunk/src/kernel/srs_kernel_codec.cpp
@@ -714,7 +714,7 @@ int SrsAvcAacCodec::video_avc_demux(char* data, int size, SrsCodecSample* sample
     return ret;
 }
 
-int SrsAvcAacCodec::video_nalu_demux(SrsStream* stream, SrsCodecSample* sample)
+int SrsAvcAacCodec::video_nalu_demux(SrsBuffer* stream, SrsCodecSample* sample)
 {
     int ret = ERROR_SUCCESS;
     
diff --git a/trunk/src/kernel/srs_kernel_codec.hpp b/trunk/src/kernel/srs_kernel_codec.hpp
index 268490954..a0aa11130 100644
--- a/trunk/src/kernel/srs_kernel_codec.hpp
+++ b/trunk/src/kernel/srs_kernel_codec.hpp
@@ -640,7 +640,7 @@ public:
     */
     virtual int video_avc_demux(char* data, int size, SrsCodecSample* sample);
 private:
-    virtual int video_nalu_demux(SrsStream* stream, SrsCodecSample* sample);
+    virtual int video_nalu_demux(SrsBuffer* stream, SrsCodecSample* sample);
 public:
     /**
     * directly demux the sequence header, without RTMP packet header.