diff --git a/ChangeLog b/ChangeLog
index 9caed9de48..9d40368af4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Jan 27 15:16:05 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/socket/socket.c (host_str): numeric address should be unsigned.
+	  [ruby-core:18971]
+
 Mon Jan 26 11:11:22 2009  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* lib/tmpdir.rb: setup buffer with nul characters instead of spaces.
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index d037be02c7..5b0c7049df 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -840,7 +840,7 @@ host_str(host, hbuf, len)
 	return NULL;
     }
     else if (rb_obj_is_kind_of(host, rb_cInteger)) {
-	long i = NUM2LONG(host);
+	unsigned long i = NUM2ULONG(host);
 
 	make_inetaddr(htonl(i), hbuf, len);
 	return hbuf;
diff --git a/version.h b/version.h
index dfe9fa56fe..0c1acef9b6 100644
--- a/version.h
+++ b/version.h
@@ -1,15 +1,15 @@
 #define RUBY_VERSION "1.8.6"
-#define RUBY_RELEASE_DATE "2009-01-26"
+#define RUBY_RELEASE_DATE "2009-01-27"
 #define RUBY_VERSION_CODE 186
-#define RUBY_RELEASE_CODE 20090126
-#define RUBY_PATCHLEVEL 310
+#define RUBY_RELEASE_CODE 20090127
+#define RUBY_PATCHLEVEL 311
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 8
 #define RUBY_VERSION_TEENY 6
 #define RUBY_RELEASE_YEAR 2009
 #define RUBY_RELEASE_MONTH 1
-#define RUBY_RELEASE_DAY 26
+#define RUBY_RELEASE_DAY 27
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];