diff --git a/ChangeLog b/ChangeLog
index 2280bd7a96..1dce588f2e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Aug  8 16:34:22 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
+
+	* lib/drb/drb.rb: removed unreachable code.
+
 Fri Aug  8 14:33:49 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* lib/webrick/httpproxy.rb: remove needless condition
diff --git a/lib/drb/drb.rb b/lib/drb/drb.rb
index ff1d3a53d3..25cf7e9c07 100644
--- a/lib/drb/drb.rb
+++ b/lib/drb/drb.rb
@@ -1594,16 +1594,9 @@ module DRb
 
     end
 
-    if RUBY_VERSION >= '1.8'
-      require 'drb/invokemethod'
-      class InvokeMethod
-        include InvokeMethod18Mixin
-      end
-    else
-      require 'drb/invokemethod16'
-      class InvokeMethod
-        include InvokeMethod16Mixin
-      end
+    require 'drb/invokemethod'
+    class InvokeMethod
+      include InvokeMethod18Mixin
     end
 
     # The main loop performed by a DRbServer's internal thread.