diff --git a/bin/console b/bin/console
index f87f98e..84367e0 100755
--- a/bin/console
+++ b/bin/console
@@ -3,12 +3,5 @@
 require "bundler/setup"
 require "zhong"
 
-# You can add fixtures and/or initialization code here to make experimenting
-# with your gem easier. You can also use a different console, if you like.
-
-# (If you use this, don't forget to add pry to your Gemfile!)
-# require "pry"
-# Pry.start
-
 require "irb"
 IRB.start
diff --git a/lib/zhong/at.rb b/lib/zhong/at.rb
index 8309ea7..b11eebe 100644
--- a/lib/zhong/at.rb
+++ b/lib/zhong/at.rb
@@ -27,7 +27,8 @@ def initialize(minute: nil, hour: nil, wday: nil, grace: 0.minutes)
     def next_at(time = Time.now)
       at_time = @wday.nil? ? time.dup : (time + (@wday - time.wday).days)
 
-      at_time = at_time.change(hour: @hour, min: @minute)
+      at_time = at_time.change(min: @minute)
+      at_time = at_time.change(hour: @hour) if @hour
 
       if at_time < @grace.ago
         if @wday.nil?