diff --git a/README.md b/README.md
index b88e54120..c3a90d7b7 100755
--- a/README.md
+++ b/README.md
@@ -146,7 +146,8 @@ For previous versions, please read:
 
 ## V3 changes
 
-* v3.0, 2019-12-25, Remove FFMPEG and NGINX, please use [srs-docker](https://github.com/ossrs/srs-docker) instead . 3.0.82
+* v3.0, 2019-12-25, For [#1538][bug #1538], fresh chunk allow fmt=0 or fmt=1. 3.0.83
+* v3.0, 2019-12-25, Remove FFMPEG and NGINX, please use [srs-docker](https://github.com/ossrs/srs-docker) instead. 3.0.82
 * v3.0, 2019-12-25, For [#1537][bug #1537], remove cross-build, not used patches, directly build st.
 * v3.0, 2019-12-24, For [#1508][bug #1508], support chunk length and content in multiple parts.
 * v3.0, 2019-12-23, Merge SRS2 for running srs-librtmp on Windows. 3.0.80
@@ -1556,6 +1557,7 @@ Winlin
 [bug #1508]: https://github.com/ossrs/srs/issues/1508
 [bug #1535]: https://github.com/ossrs/srs/issues/1535
 [bug #1537]: https://github.com/ossrs/srs/issues/1537
+[bug #1538]: https://github.com/ossrs/srs/issues/1538
 [bug #xxxxxxxxxxxxx]: https://github.com/ossrs/srs/issues/xxxxxxxxxxxxx
 
 [exo #828]: https://github.com/google/ExoPlayer/pull/828
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index 6540f8dcb..e9114f6ef 100644
--- a/trunk/src/core/srs_core.hpp
+++ b/trunk/src/core/srs_core.hpp
@@ -27,7 +27,7 @@
 // The version config.
 #define VERSION_MAJOR       3
 #define VERSION_MINOR       0
-#define VERSION_REVISION    81
+#define VERSION_REVISION    83
 
 // The macros generated by configure script.
 #include <srs_auto_headers.hpp>
diff --git a/trunk/src/protocol/srs_rtmp_stack.cpp b/trunk/src/protocol/srs_rtmp_stack.cpp
index b59a41a83..3465d0b19 100644
--- a/trunk/src/protocol/srs_rtmp_stack.cpp
+++ b/trunk/src/protocol/srs_rtmp_stack.cpp
@@ -1049,18 +1049,18 @@ srs_error_t SrsProtocol::read_message_header(SrsChunkStream* chunk, char fmt)
         // 0x00 0x06            where: event Ping(0x06)
         // 0x00 0x00 0x0d 0x0f  where: event data 4bytes ping timestamp.
         // @see: https://github.com/ossrs/srs/issues/98
-        if (chunk->cid == RTMP_CID_ProtocolControl && fmt == RTMP_FMT_TYPE1) {
-            srs_warn("accept cid=2, fmt=1 to make librtmp happy.");
+        if (fmt == RTMP_FMT_TYPE1) {
+            srs_warn("fresh chunk starts with fmt=1");
         } else {
             // must be a RTMP protocol level error.
-            return srs_error_new(ERROR_RTMP_CHUNK_START, "chunk is fresh, fmt must be %d, actual is %d. cid=%d", RTMP_FMT_TYPE0, fmt, chunk->cid);
+            return srs_error_new(ERROR_RTMP_CHUNK_START, "fresh chunk expect fmt=0, actual=%d, cid=%d", fmt, chunk->cid);
         }
     }
     
     // when exists cache msg, means got an partial message,
     // the fmt must not be type0 which means new message.
     if (chunk->msg && fmt == RTMP_FMT_TYPE0) {
-        return srs_error_new(ERROR_RTMP_CHUNK_START, "chunk exists, fmt must not be %d, actual is %d", RTMP_FMT_TYPE0, fmt);
+        return srs_error_new(ERROR_RTMP_CHUNK_START, "for existed chunk, fmt should not be 0");
     }
     
     // create msg when new chunk stream start