diff --git a/components/finsh/finsh.h b/components/finsh/finsh.h
index 12474e841..1faa38b8b 100644
--- a/components/finsh/finsh.h
+++ b/components/finsh/finsh.h
@@ -66,7 +66,7 @@ typedef unsigned char  u_char;
 typedef unsigned short u_short;
 typedef unsigned long  u_long;
 
-#if !defined(__CC_ARM) && !defined(__ICCARM__) && !defined(__ICCM16C__)
+#if !defined(__CC_ARM) && !defined(__IAR_SYSTEMS_ICC__)
 typedef unsigned int size_t;
 
 #ifndef NULL
diff --git a/components/finsh/shell.c b/components/finsh/shell.c
index a2e1b5b88..17ee92be5 100644
--- a/components/finsh/shell.c
+++ b/components/finsh/shell.c
@@ -26,6 +26,7 @@
 
 /* finsh thread */
 static struct rt_thread finsh_thread;
+ALIGN(RT_ALIGN_SIZE)
 static char finsh_thread_stack[FINSH_THREAD_STACK_SIZE];
 struct finsh_shell* shell;
 
@@ -50,7 +51,7 @@ char *strdup(const char *s)
 }
 #endif
 
-#if !defined(__CC_ARM) && !defined(__ICCARM__) && !defined(__ICCM16C__)
+#if !defined(__CC_ARM) && !defined(__IAR_SYSTEMS_ICC__)
 int isalpha( int ch )
 {
 	return (unsigned int)((ch | 0x20) - 'a') < 26u;
@@ -438,12 +439,12 @@ void finsh_system_init(void)
 	shell = (struct finsh_shell*)rt_malloc(sizeof(struct finsh_shell));
 #else
 	shell = &_shell;
-#endif
-	if (shell == RT_NULL)
-	{
-		rt_kprintf("no memory for shell\n");
-		return;
-	}
+#endif
+	if (shell == RT_NULL)
+	{
+		rt_kprintf("no memory for shell\n");
+		return;
+	}
 	
 	memset(shell, 0, sizeof(struct finsh_shell));
 
diff --git a/components/net/lwip/src/arch/include/arch/cc.h b/components/net/lwip/src/arch/include/arch/cc.h
index 82704f644..9571dbff4 100644
--- a/components/net/lwip/src/arch/include/arch/cc.h
+++ b/components/net/lwip/src/arch/include/arch/cc.h
@@ -71,7 +71,7 @@ typedef rt_uint32_t	mem_ptr_t;
 #define PACK_STRUCT_STRUCT __attribute__ ((__packed__))
 #define PACK_STRUCT_BEGIN
 #define PACK_STRUCT_END
-#elif defined(__ICCARM__)   /* IAR Compiler */
+#elif defined(__IAR_SYSTEMS_ICC__)   /* IAR Compiler */
 #define PACK_STRUCT_BEGIN
 #define PACK_STRUCT_STRUCT
 #define PACK_STRUCT_END