diff --git a/ChangeLog b/ChangeLog
index ce779f2ae9..f17b4a9c91 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Feb 19 14:24:41 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (darwin): makes dylib instead of so.
+
 Thu Feb 19 14:22:02 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/mkmf.rb (create_makefile): added phony targets.
diff --git a/configure.in b/configure.in
index 7dda61dc71..8934b493d2 100644
--- a/configure.in
+++ b/configure.in
@@ -1834,6 +1834,7 @@ if test "$enable_shared" = 'yes'; then
 	RUBY_SO_NAME="$RUBY_SO_NAME"'.$(MAJOR).$(MINOR).$(TEENY)'
 	LIBRUBY_LDSHARED='cc -dynamiclib -undefined suppress -flat_namespace'
 	LIBRUBY_DLDFLAGS='-install_name $(libdir)/lib$(RUBY_SO_NAME).dylib -current_version $(MAJOR).$(MINOR).$(TEENY) -compatibility_version $(MAJOR).$(MINOR).$(TEENY)'
+	LIBRUBY_SO='lib$(RUBY_SO_NAME).dylib.$(MAJOR).$(MINOR).$(TEENY)'
 	LIBRUBY_ALIASES='lib$(RUBY_SO_NAME).dylib lib$(RUBY_INSTALL_NAME).$(MAJOR).$(MINOR).dylib lib$(RUBY_INSTALL_NAME).dylib'
 	;;
     when(interix*)