diff --git a/nshlib/nsh_timcmds.c b/nshlib/nsh_timcmds.c
index 1004c667d..bbfb7138a 100644
--- a/nshlib/nsh_timcmds.c
+++ b/nshlib/nsh_timcmds.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * apps/nshlib/dbg_timcmds.c
  *
- *   Copyright (C) 2011-2012, 2014 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2011-2012, 2014, 2019 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -166,6 +166,8 @@ static inline int date_settime(FAR struct nsh_vtbl_s *vtbl, FAR const char *name
   long result;
   int ret;
 
+  memset(&tm, 0, sizeof(tm));
+
   /* Only this date format is supported: MMM DD HH:MM:SS YYYY */
   /* Get the month abbreviation */