diff --git a/src/date-picker/calendar.jsx b/src/date-picker/calendar.jsx
index f554ac4176a271..904c880388109d 100644
--- a/src/date-picker/calendar.jsx
+++ b/src/date-picker/calendar.jsx
@@ -114,7 +114,7 @@ const Calendar = React.createClass({
         height: isLandscape ?
           weekCount === 5 ? 238 :
           weekCount === 6 ? 278 :
-          198 : '100%',
+          198 : 'auto',
         float: isLandscape ? 'left' : 'none',
       },
       weekTitle: {