diff --git a/trunk/src/core/srs_core_protocol.cpp b/trunk/src/core/srs_core_protocol.cpp
old mode 100644
new mode 100755
index d8a032352..134d7a72a
--- a/trunk/src/core/srs_core_protocol.cpp
+++ b/trunk/src/core/srs_core_protocol.cpp
@@ -978,7 +978,7 @@ int SrsProtocol::read_message_header(SrsChunkStream* chunk, char fmt, int bh_siz
             
             chunk->header.message_type = *p++;
             
-            if (fmt == 0) {
+            if (fmt == RTMP_FMT_TYPE0) {
                 pp = (char*)&chunk->header.stream_id;
                 pp[0] = *p++;
                 pp[1] = *p++;