diff --git a/src/ac/ac_backend.c b/src/ac/ac_backend.c
index 8fb01d0..be96687 100644
--- a/src/ac/ac_backend.c
+++ b/src/ac/ac_backend.c
@@ -665,8 +665,10 @@ void ac_backend_stop(void) {
 
 	/* Wait close thread */
 	pthread_join(g_ac_backend.threadid, &dummy);
+}
 
-	/* */
+/* */
+void ac_backend_free(void) {
 	capwap_event_destroy(&g_ac_backend.wait);
 	capwap_lock_destroy(&g_ac_backend.lock);
 	capwap_lock_destroy(&g_ac_backend.backendlock);
diff --git a/src/ac/ac_backend.h b/src/ac/ac_backend.h
index 8af85ce..e7f9aa5 100644
--- a/src/ac/ac_backend.h
+++ b/src/ac/ac_backend.h
@@ -18,6 +18,7 @@ struct ac_notify_reset_t {
 /* */
 int ac_backend_start(void);
 void ac_backend_stop(void);
+void ac_backend_free(void);
 
 /* */
 int ac_backend_isconnect(void);
diff --git a/src/ac/ac_execute.c b/src/ac/ac_execute.c
index b543d63..6275a50 100644
--- a/src/ac/ac_execute.c
+++ b/src/ac/ac_execute.c
@@ -872,6 +872,9 @@ int ac_execute(void) {
 	/* Wait to terminate all sessions */
 	ac_wait_terminate_allsessions();
 
+	/* Free Backend Management */
+	ac_backend_free();
+
 	/* Free memory */
 	capwap_free(fds);
 	return result;