diff --git a/trunk/src/protocol/srs_protocol_rtmp_stack.cpp b/trunk/src/protocol/srs_protocol_rtmp_stack.cpp
index 2e75b0d4ff..5a19e72c12 100644
--- a/trunk/src/protocol/srs_protocol_rtmp_stack.cpp
+++ b/trunk/src/protocol/srs_protocol_rtmp_stack.cpp
@@ -539,7 +539,7 @@ srs_error_t SrsProtocol::do_send_messages(SrsSharedPtrMessage** msgs, int nb_msg
             // consume sendout bytes.
             p += payload_size;
             
-            if ((er = skt->writev(iovs, 2, NULL)) != srs_success) {
+            if ((err = skt->writev(iovs, 2, NULL)) != srs_success) {
                 return srs_error_wrap(err, "writev");
             }
         }