diff --git a/ChangeLog b/ChangeLog
index 0421bd2960..572a956d91 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Feb 22 11:33:42 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/mkmf.rb (MakeMakefile#init_mkmf): adjust default library path
+	  for multiarch.  [Bug #7874]
+
 Fri Feb 22 11:10:00 2013  Zachary Scott  <zachary@zacharyscott.net>
 
 	* enum.c (Enumerable#chunk: Improved examples, grammar, and formatting
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 7ebc198202..efa2982a23 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -2339,7 +2339,7 @@ site-install-rb: install-rb
     $LIBRUBYARG = ""
     $LIBRUBYARG_STATIC = config['LIBRUBYARG_STATIC']
     $LIBRUBYARG_SHARED = config['LIBRUBYARG_SHARED']
-    $DEFLIBPATH = [$extmk ? "$(topdir)" : "$(libdir)"]
+    $DEFLIBPATH = [$extmk ? "$(topdir)" : "$(#{config["libdirname"]})"]
     $DEFLIBPATH.unshift(".")
     $LIBPATH = []
     $INSTALLFILES = []