diff --git a/cap/zx297520v3/src/lynq/lib/liblynq-call/lynq_call.cpp b/cap/zx297520v3/src/lynq/lib/liblynq-call/lynq_call.cpp
index 9525e75..3598539 100755
--- a/cap/zx297520v3/src/lynq/lib/liblynq-call/lynq_call.cpp
+++ b/cap/zx297520v3/src/lynq/lib/liblynq-call/lynq_call.cpp
@@ -760,7 +760,8 @@
         return LYNQ_E_PARAMETER_ANONALY;
     }
     g_module_init_flag = MODULE_SWITCHING;
-
+    s_call_state_change_mutex = PTHREAD_MUTEX_INITIALIZER;
+    
     LYLOGSET(LOG_INFO);
     LYLOGEINIT(USER_LOG_TAG);   
 
@@ -813,6 +814,7 @@
     lynq_close_all_rc_socket_thread();    
     lynq_stop_call_list_loop();
     g_module_init_flag = MODULE_CLOSED;
+    pthread_mutex_destroy(&s_call_state_change_mutex);
     return 0;
 }