diff --git a/trunk/src/main/srs_main_server.cpp b/trunk/src/main/srs_main_server.cpp
index 01e9b249f5..33aa7375f6 100644
--- a/trunk/src/main/srs_main_server.cpp
+++ b/trunk/src/main/srs_main_server.cpp
@@ -81,9 +81,6 @@ const char* _srs_binary = NULL;
 // @global Other variables.
 bool _srs_in_docker = false;
 
-// Free global data, for address sanitizer.
-extern void srs_free_global_system_ips();
-
 #ifdef SRS_SANITIZER_LOG
 extern void asan_report_callback(const char* str);
 #endif
@@ -242,9 +239,7 @@ srs_error_t do_main(int argc, char** argv, char** envp)
     __asan_set_error_report_callback(asan_report_callback);
 #endif
 
-    err = run_directly_or_daemon();
-    srs_free_global_system_ips();
-    if (err != srs_success) {
+    if ((err = run_directly_or_daemon()) != srs_success) {
         return srs_error_wrap(err, "run");
     }
 
@@ -440,7 +435,6 @@ srs_error_t run_directly_or_daemon()
         int status = 0;
         waitpid(pid, &status, 0);
         srs_trace("grandpa process exit.");
-        srs_free_global_system_ips();
         exit(0);
     }
     
@@ -453,7 +447,6 @@ srs_error_t run_directly_or_daemon()
     
     if(pid > 0) {
         srs_trace("father process exit");
-        srs_free_global_system_ips();
         exit(0);
     }
     
diff --git a/trunk/src/protocol/srs_protocol_utility.cpp b/trunk/src/protocol/srs_protocol_utility.cpp
index 749ea3342f..620ebfea45 100644
--- a/trunk/src/protocol/srs_protocol_utility.cpp
+++ b/trunk/src/protocol/srs_protocol_utility.cpp
@@ -673,17 +673,6 @@ bool srs_net_device_is_internet(const sockaddr* addr)
 }
 
 vector<SrsIPAddress*> _srs_system_ips;
-void srs_free_global_system_ips()
-{
-    vector<SrsIPAddress*>& ips = _srs_system_ips;
-
-    // Release previous IPs.
-    for (int i = 0; i < (int)ips.size(); i++) {
-        SrsIPAddress* ip = ips[i];
-        srs_freep(ip);
-    }
-    ips.clear();
-}
 
 void discover_network_iface(ifaddrs* cur, vector<SrsIPAddress*>& ips, stringstream& ss0, stringstream& ss1, bool ipv6, bool loopback)
 {
@@ -721,9 +710,6 @@ void discover_network_iface(ifaddrs* cur, vector<SrsIPAddress*>& ips, stringstre
 
 void retrieve_local_ips()
 {
-    // Release previous IPs.
-    srs_free_global_system_ips();
-
     vector<SrsIPAddress*>& ips = _srs_system_ips;
 
     // Get the addresses.
diff --git a/trunk/src/utest/srs_utest.cpp b/trunk/src/utest/srs_utest.cpp
index 9a9dca5dcb..866ef1fc11 100644
--- a/trunk/src/utest/srs_utest.cpp
+++ b/trunk/src/utest/srs_utest.cpp
@@ -96,9 +96,6 @@ srs_error_t prepare_main() {
     return err;
 }
 
-// Free global data, for address sanitizer.
-extern void srs_free_global_system_ips();
-
 // We could do something in the main of utest.
 // Copy from gtest-1.6.0/src/gtest_main.cc
 GTEST_API_ int main(int argc, char **argv) {
@@ -117,8 +114,6 @@ GTEST_API_ int main(int argc, char **argv) {
     testing::InitGoogleTest(&argc, argv);
     int r0 = RUN_ALL_TESTS();
 
-    srs_free_global_system_ips();
-
     return r0;
 }