diff --git a/ChangeLog b/ChangeLog
index 1e47a27a09..d74838052f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Mar  8 19:35:13 2004  akira yamada  <akira@arika.org>
+
+	* lib/uri/common.rb (URI::REGEXP::PATTERN::HOSTPORT): (?:#{PORT})
+	  -> (?::#{PORT}).  [ruby-dev:23170]
+
 Mon Mar  8 15:03:24  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
 
 	* dir.c (range): treat incomplete '[' as ordinary character (like
diff --git a/lib/uri/common.rb b/lib/uri/common.rb
index fbb3558a32..c9b3e0de70 100644
--- a/lib/uri/common.rb
+++ b/lib/uri/common.rb
@@ -90,7 +90,7 @@ module URI
       # port          = *digit
       PORT = "\d*"
       # hostport      = host [ ":" port ]
-      HOSTPORT = "#{HOST}(?:#{PORT})?"
+      HOSTPORT = "#{HOST}(?::#{PORT})?"
 
       # userinfo      = *( unreserved | escaped |
       #                    ";" | ":" | "&" | "=" | "+" | "$" | "," )