diff --git a/trunk/src/app/srs_app_gb28181.hpp b/trunk/src/app/srs_app_gb28181.hpp
index 4793708b0..3f215b1d9 100644
--- a/trunk/src/app/srs_app_gb28181.hpp
+++ b/trunk/src/app/srs_app_gb28181.hpp
@@ -347,6 +347,8 @@ private:
 // Interface ISrsOneCycleThreadHandler
 public:
     virtual srs_error_t cycle();
+// Interface ISrsConnection.
+public:
     virtual std::string remote_ip();
     virtual const SrsContextId& get_id();
     virtual std::string desc();
diff --git a/trunk/src/app/srs_app_gb28181_sip.hpp b/trunk/src/app/srs_app_gb28181_sip.hpp
index 6e5eb393d..d3480fe9b 100644
--- a/trunk/src/app/srs_app_gb28181_sip.hpp
+++ b/trunk/src/app/srs_app_gb28181_sip.hpp
@@ -142,7 +142,9 @@ public:
     
 // Interface ISrsOneCycleThreadHandler
 public:
-    virtual srs_error_t cycle();   
+    virtual srs_error_t cycle();
+// Interface ISrsConnection.
+public:
     virtual std::string remote_ip();
     virtual const SrsContextId& get_id();
     virtual std::string desc();
diff --git a/trunk/src/utest/srs_utest_service.hpp b/trunk/src/utest/srs_utest_service.hpp
index 96a0c01ab..ab4ed8ea3 100644
--- a/trunk/src/utest/srs_utest_service.hpp
+++ b/trunk/src/utest/srs_utest_service.hpp
@@ -40,6 +40,8 @@ public:
 public:
     MockSrsConnection();
     virtual ~MockSrsConnection();
+// Interface ISrsConnection.
+public:
     virtual const SrsContextId& get_id();
     virtual std::string desc();
     virtual std::string remote_ip();