diff --git a/lib/fugit/duration.rb b/lib/fugit/duration.rb
index 62841fa..6320acb 100644
--- a/lib/fugit/duration.rb
+++ b/lib/fugit/duration.rb
@@ -255,7 +255,7 @@ def add_to_time(t)
           at[0], at[1] = at[0] - n, m
         end
 
-        t = ::EtOrbi.make_time(at, t.zone)
+        t = ::EtOrbi.make_time(at, t.zone) + (t.to_f % 1)
       end
 
       t