diff --git a/lib/http/cookie_jar.rb b/lib/http/cookie_jar.rb
index fd0ceaa..7e8b04d 100644
--- a/lib/http/cookie_jar.rb
+++ b/lib/http/cookie_jar.rb
@@ -67,21 +67,19 @@ class HTTP::CookieJar
 
   # Iterates over all cookies that are not expired.
   #
-  # Available option keywords are below:
+  # An optional argument +uri+ specifies a URI/URL indicating the
+  # destination of the cookies being selected.  Every cookie yielded
+  # should be good to send to the given URI,
+  # i.e. cookie.valid_for_uri?(uri) evaluates to true.
   #
-  # * +uri+
-  #
-  #   Specify a URI/URL indicating the destination of the cookies
-  #   being selected.  Every cookie yielded should be good to send to
-  #   the given URI, i.e. cookie.valid_for_uri?(uri) evaluates to
-  #   true.
-  #
-  #   If (and only if) this option is given, last access time of each
-  #   cookie is updated to the current time.
+  # If (and only if) the +uri+ option is given, last access time of
+  # each cookie is updated to the current time.
   def each(uri = nil, &block)
     block_given? or return enum_for(__method__, uri)
 
     if uri
+      uri = URI(uri)
+      return self unless URI::HTTP === uri && uri.host
       block = proc { |cookie|
         yield cookie if cookie.valid_for_uri?(uri)
       }
diff --git a/lib/http/cookie_jar/abstract_store.rb b/lib/http/cookie_jar/abstract_store.rb
index 6565ab4..fa854f8 100644
--- a/lib/http/cookie_jar/abstract_store.rb
+++ b/lib/http/cookie_jar/abstract_store.rb
@@ -54,18 +54,14 @@ class HTTP::CookieJar::AbstractStore
 
   # Iterates over all cookies that are not expired.
   #
-  # Available option keywords are below:
+  # An optional argument +uri+ specifies a URI object indicating the
+  # destination of the cookies being selected.  Every cookie yielded
+  # should be good to send to the given URI,
+  # i.e. cookie.valid_for_uri?(uri) evaluates to true.
   #
-  # * +uri+
-  #
-  #   Specify a URI object indicating the destination of the cookies
-  #   being selected.  Every cookie yielded should be good to send to
-  #   the given URI, i.e. cookie.valid_for_uri?(uri) evaluates to
-  #   true.
-  #
-  #   If (and only if) this option is given, last access time of each
-  #   cookie is updated to the current time.
-  def each(options = nil, &block)
+  # If (and only if) the +uri+ option is given, last access time of
+  # each cookie is updated to the current time.
+  def each(uri = nil, &block)
     raise
     self
   end
diff --git a/lib/http/cookie_jar/hash_store.rb b/lib/http/cookie_jar/hash_store.rb
index e63c19a..76a35da 100644
--- a/lib/http/cookie_jar/hash_store.rb
+++ b/lib/http/cookie_jar/hash_store.rb
@@ -51,7 +51,6 @@ class HTTP::CookieJar
 
     def each(uri = nil)
       if uri
-        uri = URI(uri)
         thost = DomainName.new(uri.host)
         tpath = HTTP::Cookie.normalize_path(uri.path)
         @jar.each { |domain, paths|
@@ -83,6 +82,7 @@ class HTTP::CookieJar
           }
         }
       end
+      self
     end
 
     def clear
diff --git a/test/test_http_cookie_jar.rb b/test/test_http_cookie_jar.rb
index 250072d..30364ea 100644
--- a/test/test_http_cookie_jar.rb
+++ b/test/test_http_cookie_jar.rb
@@ -276,6 +276,8 @@ class TestHTTPCookieJar < Test::Unit::TestCase
     assert_raises(ArgumentError) {
       @jar.add(HTTP::Cookie.new(cookie_values(:origin => url)))
     }
+
+    assert_equal(0, @jar.cookies(url).length)
   end
 
   def test_clear