diff --git a/trunk/src/app/srs_app_pithy_print.cpp b/trunk/src/app/srs_app_pithy_print.cpp
index 9494c13e9..e3f9e7e89 100644
--- a/trunk/src/app/srs_app_pithy_print.cpp
+++ b/trunk/src/app/srs_app_pithy_print.cpp
@@ -125,7 +125,11 @@ SrsErrorPithyPrint::~SrsErrorPithyPrint()
 bool SrsErrorPithyPrint::can_print(srs_error_t err)
 {
     int error_code = srs_error_code(err);
+    return can_print(error_code);
+}
 
+bool SrsErrorPithyPrint::can_print(int error_code)
+{
     bool new_stage = false;
     SrsStageInfo* stage = stages.fetch_or_create(error_code, &new_stage);
 
diff --git a/trunk/src/app/srs_app_pithy_print.hpp b/trunk/src/app/srs_app_pithy_print.hpp
index ac985fdb5..cabd6d7ff 100644
--- a/trunk/src/app/srs_app_pithy_print.hpp
+++ b/trunk/src/app/srs_app_pithy_print.hpp
@@ -77,6 +77,8 @@ public:
 public:
     // Whether specified stage is ready for print.
     bool can_print(srs_error_t err);
+    // We also support int error code.
+    bool can_print(int err);
 };
 
 // The stage is used for a collection of object to do print,
diff --git a/trunk/src/app/srs_app_rtc_conn.cpp b/trunk/src/app/srs_app_rtc_conn.cpp
index 093394d2c..9291f5346 100644
--- a/trunk/src/app/srs_app_rtc_conn.cpp
+++ b/trunk/src/app/srs_app_rtc_conn.cpp
@@ -1580,6 +1580,7 @@ SrsRtcConnection::SrsRtcConnection(SrsRtcServer* s, SrsContextId context_id)
 
     twcc_id_ = 0;
     nn_simulate_player_nack_drop = 0;
+    pp_address_change = new SrsErrorPithyPrint();
 }
 
 SrsRtcConnection::~SrsRtcConnection()
@@ -1597,6 +1598,8 @@ SrsRtcConnection::~SrsRtcConnection()
         SrsUdpMuxSocket* addr = it->second;
         srs_freep(addr);
     }
+
+    srs_freep(pp_address_change);
 }
 
 SrsSdp* SrsRtcConnection::get_local_sdp()
@@ -1934,14 +1937,6 @@ void SrsRtcConnection::update_sendonly_socket(SrsUdpMuxSocket* skt)
         return;
     }
 
-    // Detect address change.
-    if (prev_peer_id.empty()) {
-        srs_trace("RTC: session address init %s", peer_id.c_str());
-    } else {
-        srs_trace("RTC: session address changed, update %s -> %s, total %u", prev_peer_id.c_str(),
-            peer_id.c_str(), peer_addresses_.size());
-    }
-
     // Find object from cache.
     SrsUdpMuxSocket* addr_cache = NULL;
     if (true) {
@@ -1957,6 +1952,14 @@ void SrsRtcConnection::update_sendonly_socket(SrsUdpMuxSocket* skt)
         server_->insert_into_id_sessions(peer_id, this);
     }
 
+    // Detect address change.
+    if (prev_peer_id.empty()) {
+        srs_trace("RTC: session address init %s", peer_id.c_str());
+    } else if (pp_address_change->can_print(skt->get_peer_port())) {
+        srs_trace("RTC: session address changed, update %s -> %s, cached=%d, total=%u", prev_peer_id.c_str(),
+            peer_id.c_str(), (addr_cache? 1:0), peer_addresses_.size());
+    }
+
     // Update the transport.
     sendonly_skt = addr_cache;
 }
diff --git a/trunk/src/app/srs_app_rtc_conn.hpp b/trunk/src/app/srs_app_rtc_conn.hpp
index 6745d5bf7..0a5820dca 100644
--- a/trunk/src/app/srs_app_rtc_conn.hpp
+++ b/trunk/src/app/srs_app_rtc_conn.hpp
@@ -59,6 +59,7 @@ class SrsRtpRingBuffer;
 class SrsRtcConsumer;
 class SrsRtcAudioSendTrack;
 class SrsRtcVideoSendTrack;
+class SrsErrorPithyPrint;
 
 const uint8_t kSR   = 200;
 const uint8_t kRR   = 201;
@@ -347,6 +348,8 @@ private:
     int twcc_id_;
     // Simulators.
     int nn_simulate_player_nack_drop;
+    // Pithy print for address change, use port as error code.
+    SrsErrorPithyPrint* pp_address_change;
 public:
     SrsRtcConnection(SrsRtcServer* s, SrsContextId context_id);
     virtual ~SrsRtcConnection();