lib/fast_excel.rb in fast_excel-0.2.2 vs lib/fast_excel.rb in fast_excel-0.2.3

@@ -395,11 +395,11 @@
         raise ArgumentError, "Can not write to saved row in constant_memory mode (attempted row: #{row_number}, last saved row: #{last_row_number})"
       end
 
       if value.is_a?(Numeric)
         write_number(row_number, cell_number, value, format)
-      elsif defined?(DateTime) && value.is_a?(DateTime)
-        write_datetime(row_number, cell_number, FastExcel.lxw_datetime(value), format)
+      elsif defined?(Date) && value.is_a?(Date)
+        write_datetime(row_number, cell_number, FastExcel.lxw_datetime(value.to_datetime), format)
       elsif value.is_a?(Time)
         write_datetime(row_number, cell_number, FastExcel.lxw_time(value), format)
       elsif value.is_a?(Formula)
         write_formula(row_number, cell_number, value.fml, format)
       else