diff --git a/src/idle.c b/src/idle.c
index 453f6bc40..f750a8160 100644
--- a/src/idle.c
+++ b/src/idle.c
@@ -23,6 +23,7 @@
 #endif
 
 static struct rt_thread idle;
+ALIGN(RT_ALIGN_SIZE)
 static rt_uint8_t rt_thread_stack[IDLE_THREAD_STACK_SIZE];
 
 #ifdef RT_USING_HEAP
diff --git a/src/kservice.c b/src/kservice.c
index 6f268609c..e5ed2d39a 100644
--- a/src/kservice.c
+++ b/src/kservice.c
@@ -926,9 +926,7 @@ void rt_hw_console_output(const char* str) __attribute__((weak));
 void rt_hw_console_output(const char* str)
 #elif defined(__CC_ARM)
 __weak void rt_hw_console_output(const char* str)
-#elif defined(__ICCARM__)
-__weak void rt_hw_console_output(const char* str)
-#elif defined(__ICCM16C__)
+#elif defined(__IAR_SYSTEMS_ICC__)
 void rt_hw_console_output(const char* str)
 #endif
 {