diff --git a/lib/validates_timeliness/active_record/multiparameter_attributes.rb b/lib/validates_timeliness/active_record/multiparameter_attributes.rb
index a2d4fa6..a755e04 100644
--- a/lib/validates_timeliness/active_record/multiparameter_attributes.rb
+++ b/lib/validates_timeliness/active_record/multiparameter_attributes.rb
@@ -56,7 +56,8 @@ module ValidatesTimeliness
       end
       
       def extract_time_from_multiparameter_attributes(values)
-        values.last(3).map { |s| s.rjust(2, "0") }.join(":")
+        values = values.size > 3 ? values[3..5] : values
+        values.map { |s| s.rjust(2, "0") }.join(":")
       end
       
     end