diff --git a/trunk/src/app/srs_app_rtc_conn.cpp b/trunk/src/app/srs_app_rtc_conn.cpp
index 3fc3a0bc5..127647d89 100644
--- a/trunk/src/app/srs_app_rtc_conn.cpp
+++ b/trunk/src/app/srs_app_rtc_conn.cpp
@@ -53,7 +53,6 @@ using namespace std;
 #include <srs_app_rtc_dtls.hpp>
 #include <srs_app_utility.hpp>
 #include <srs_app_config.hpp>
-#include <srs_app_rtc.hpp>
 #include <srs_app_rtc_queue.hpp>
 #include <srs_app_source.hpp>
 #include <srs_app_server.hpp>
diff --git a/trunk/src/app/srs_app_rtc_server.cpp b/trunk/src/app/srs_app_rtc_server.cpp
index 992319c7e..ea5056528 100644
--- a/trunk/src/app/srs_app_rtc_server.cpp
+++ b/trunk/src/app/srs_app_rtc_server.cpp
@@ -27,7 +27,6 @@
 #include <srs_kernel_error.hpp>
 #include <srs_kernel_utility.hpp>
 #include <srs_kernel_log.hpp>
-#include <srs_app_rtc.hpp>
 #include <srs_app_statistic.hpp>
 #include <srs_app_pithy_print.hpp>
 #include <srs_core_autofree.hpp>
diff --git a/trunk/src/app/srs_app_rtc_source.cpp b/trunk/src/app/srs_app_rtc_source.cpp
index f98d48d2d..a048c2c4c 100644
--- a/trunk/src/app/srs_app_rtc_source.cpp
+++ b/trunk/src/app/srs_app_rtc_source.cpp
@@ -32,7 +32,6 @@
 #include <srs_rtmp_msg_array.hpp>
 #include <srs_kernel_utility.hpp>
 #include <srs_protocol_format.hpp>
-#include <srs_app_rtc.hpp>
 #include <srs_kernel_buffer.hpp>
 #include <srs_app_rtc_codec.hpp>
 
diff --git a/trunk/src/kernel/srs_kernel_rtc_rtp.hpp b/trunk/src/kernel/srs_kernel_rtc_rtp.hpp
index 77a7fb5b3..f65d54dd3 100644
--- a/trunk/src/kernel/srs_kernel_rtc_rtp.hpp
+++ b/trunk/src/kernel/srs_kernel_rtc_rtp.hpp
@@ -33,8 +33,11 @@
 
 class SrsRtpPacket2;
 
-const int kRtpHeaderFixedSize = 12;
-const uint8_t kRtpMarker = 0x80;
+// The RTP packet max size, should never exceed this size.
+const int kRtpPacketSize        = 1500;
+
+const int kRtpHeaderFixedSize   = 12;
+const uint8_t kRtpMarker        = 0x80;
 
 // H.264 nalu header type mask.
 const uint8_t kNalTypeMask      = 0x1F;