diff --git a/activesupport/lib/active_support/xml_mini.rb b/activesupport/lib/active_support/xml_mini.rb
index 78c78015d2d1e3c38807eb7b24af3a6b03a1e531..1ea9a9d7e164912906f2281d58335bddacbe844e 100644
--- a/activesupport/lib/active_support/xml_mini.rb
+++ b/activesupport/lib/active_support/xml_mini.rb
@@ -1,3 +1,4 @@
+require 'time'
 require 'active_support/core_ext/module/delegation'
 require 'active_support/core_ext/string/inflections'
 
@@ -56,7 +57,7 @@ def content_type
       PARSING = {
         "symbol"       => Proc.new { |symbol|  symbol.to_sym },
         "date"         => Proc.new { |date|    ::Date.parse(date) },
-        "datetime"     => Proc.new { |time|    ::Time.xmlschema(time).utc rescue ::DateTime.parse(time).utc },
+        "datetime"     => Proc.new { |time|    Time.xmlschema(time).utc rescue ::DateTime.parse(time).utc },
         "integer"      => Proc.new { |integer| integer.to_i },
         "float"        => Proc.new { |float|   float.to_f },
         "decimal"      => Proc.new { |number|  BigDecimal(number) },