diff --git a/components/date-picker/style/TimePicker.less b/components/date-picker/style/TimePicker.less
index ae1d09e85d..4f23c16a11 100644
--- a/components/date-picker/style/TimePicker.less
+++ b/components/date-picker/style/TimePicker.less
@@ -1,4 +1,4 @@
-.@{timepicker-prefix-cls} {
+.@{calendar-timepicker-prefix-cls} {
   position: absolute;
   width: 100%;
   top: 34px;
diff --git a/components/date-picker/style/index.less b/components/date-picker/style/index.less
index f520d844d3..37139915a3 100644
--- a/components/date-picker/style/index.less
+++ b/components/date-picker/style/index.less
@@ -4,7 +4,7 @@
 @import "../../button/style/mixin";
 
 @calendar-prefix-cls: ~"@{ant-prefix}-calendar";
-@timepicker-prefix-cls: ~"@{ant-prefix}-calendar-time-picker";
+@calendar-timepicker-prefix-cls: ~"@{ant-prefix}-calendar-time-picker";
 
 @import "Picker";
 @import "Calendar";