diff --git a/bsp/simulator/SConstruct b/bsp/simulator/SConstruct
index a95fe7d23fa9b7303acdc7acd1bb36a6f09ff930..3f8508d5cb9709b0cda76f9467c6db3d4b4e1c22 100755
--- a/bsp/simulator/SConstruct
+++ b/bsp/simulator/SConstruct
@@ -45,7 +45,6 @@ if rtconfig.PLATFORM == 'cl':
     _DEBUG
     _CONSOLE
     MSVC
-    _TIME_T_DEFINED
     ''')
     env.Append(CCFLAGS=rtconfig.CFLAGS)
     env.Append(LINKFLAGS=rtconfig.LFLAGS)
diff --git a/components/dfs/filesystems/jffs2/include/port/sys/stat.h b/components/dfs/filesystems/jffs2/include/port/sys/stat.h
index 783c1d8d6c8d947a96cfb0dfd005364fb63d1ab3..845f40d1f45459a3826dabaa66bd2b87c54d9c74 100644
--- a/components/dfs/filesystems/jffs2/include/port/sys/stat.h
+++ b/components/dfs/filesystems/jffs2/include/port/sys/stat.h
@@ -317,10 +317,11 @@ typedef void *cyg_io_handle_t;
 #define S_ISGID  (1<<26)
 
 #if defined(MSVC)
+/* for time_t */
+#include <time.h>
 typedef unsigned long mode_t;
 typedef unsigned int ino_t;
 typedef unsigned int dev_t;
-typedef int time_t;
 typedef long ssize_t;
 #elif defined(__CC_ARM)  
 #define mode_t unsigned long
diff --git a/components/dfs/filesystems/jffs2/include/port/sys/types.h b/components/dfs/filesystems/jffs2/include/port/sys/types.h
index b193a58ab9351a036b572a72cfd19fe5a27db5ae..ab195a57ea4d24d1fc59227ab187306415368a42 100644
--- a/components/dfs/filesystems/jffs2/include/port/sys/types.h
+++ b/components/dfs/filesystems/jffs2/include/port/sys/types.h
@@ -78,7 +78,11 @@ typedef unsigned short gid_t;
 typedef unsigned short uid_t;
 typedef int pid_t;
 
+#if defined(MSVC)
+#include <time.h>
+#else
 typedef int time_t;
+#endif
 //#include "os_sys_stat.h"
 #endif /* CYGONCE_ISO_SYS_TYPES_H multiple inclusion protection */