diff --git a/activeresource/lib/active_resource/base.rb b/activeresource/lib/active_resource/base.rb
index f88772a7ff89e..990d9a38dd5d3 100644
--- a/activeresource/lib/active_resource/base.rb
+++ b/activeresource/lib/active_resource/base.rb
@@ -955,7 +955,7 @@ def split_options(options = {})
           prefix_options, query_options = {}, {}
 
           (options || {}).each do |key, value|
-            next if key.blank? || [Fixnum, Date, Time, Float].include?(key.class)
+            next if key.blank? || !key.respond_to?(:to_sym)
             (prefix_parameters.include?(key.to_sym) ? prefix_options : query_options)[key.to_sym] = value
           end
 
diff --git a/activeresource/test/cases/base/load_test.rb b/activeresource/test/cases/base/load_test.rb
index 0d030148d055d..0bbd3ab5f5dd3 100644
--- a/activeresource/test/cases/base/load_test.rb
+++ b/activeresource/test/cases/base/load_test.rb
@@ -51,9 +51,28 @@ def setup
         :votes => [ true, false, true ],
         :places => [ "Columbia City", "Unknown" ]}}}
 
+
+    # List of books formated as [{timestamp_of_publication => name}, ...]
+    @books = {:books => [
+        {1009839600 => "Ruby in a Nutshell"},
+        {1199142000 => "The Ruby Programming Language"}
+      ]}
+
+    @books_date = {:books => [
+        {Time.at(1009839600) => "Ruby in a Nutshell"},
+        {Time.at(1199142000) => "The Ruby Programming Language"}
+    ]}
     @person = Person.new
   end
 
+  def test_load_hash_with_integers_as_keys
+    assert_nothing_raised{person = @person.load(@books)}
+  end
+
+  def test_load_hash_with_dates_as_keys
+    assert_nothing_raised{person = @person.load(@books_date)}
+  end
+
   def test_load_expects_hash
     assert_raise(ArgumentError) { @person.load nil }
     assert_raise(ArgumentError) { @person.load '<person id="1"/>' }