diff --git a/components/cplusplus/Thread.cpp b/components/cplusplus/Thread.cpp
index 4d2d8a59ea47a88491c31702a81f01c45346d8b1..a01bd95e4ba09418f4a222e9dc0738cfe5c15011 100644
--- a/components/cplusplus/Thread.cpp
+++ b/components/cplusplus/Thread.cpp
@@ -6,7 +6,7 @@ Thread::Thread(rt_uint32_t stack_size,
                rt_uint8_t  priority,
                rt_uint32_t tick,
                const char *name)
-: _entry(RT_NULL), started(false)
+: _entry(RT_NULL), _param(RT_NULL), started(false)
 {
     rt_event_init(&_event, name, 0);
 
@@ -24,7 +24,7 @@ Thread::Thread(void (*entry)(void *p),
                rt_uint8_t  priority,
                rt_uint32_t tick,
                const char *name)
-: _entry(RT_NULL), started(false), _param(p)
+: _entry(RT_NULL), _param(p), started(false)
 {
     rt_event_init(&_event, name, 0);