diff --git a/ChangeLog b/ChangeLog
index b34ef11905..f662581361 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Fri Sep  5 14:08:00 2014  Masaki Suketa <masaki.suketa@nifty.ne.jp>
+
+	* ext/win32ole/win32ole.c (ole_create_dcom): use the converted
+	  result if the argument can be converted to a string, to get rid
+	  of invalid access. Thanks to nobu. [ruby-dev:48467] [Bug #10127]
+
 Fri Sep  5 14:00:33 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* process.c (open): use UTF-8 version function to support
diff --git a/ext/win32ole/win32ole.c b/ext/win32ole/win32ole.c
index b48a8a7291..3174815aef 100644
--- a/ext/win32ole/win32ole.c
+++ b/ext/win32ole/win32ole.c
@@ -361,7 +361,7 @@ static VALUE typelib_file_from_typelib(VALUE ole);
 static VALUE typelib_file(VALUE ole);
 static void ole_const_load(ITypeLib *pTypeLib, VALUE klass, VALUE self);
 static HRESULT clsid_from_remote(VALUE host, VALUE com, CLSID *pclsid);
-static VALUE ole_create_dcom(int argc, VALUE *argv, VALUE self);
+static VALUE ole_create_dcom(VALUE self, VALUE ole, VALUE host, VALUE others);
 static VALUE ole_bind_obj(VALUE moniker, int argc, VALUE *argv, VALUE self);
 static VALUE fole_s_connect(int argc, VALUE *argv, VALUE self);
 static VALUE fole_s_const_load(int argc, VALUE *argv, VALUE self);
@@ -2612,9 +2612,8 @@ clsid_from_remote(VALUE host, VALUE com, CLSID *pclsid)
 }
 
 static VALUE
-ole_create_dcom(int argc, VALUE *argv, VALUE self)
+ole_create_dcom(VALUE self, VALUE ole, VALUE host, VALUE others)
 {
-    VALUE ole, host, others;
     HRESULT hr;
     CLSID   clsid;
     OLECHAR *pbuf;
@@ -2632,7 +2631,6 @@ ole_create_dcom(int argc, VALUE *argv, VALUE self)
             GetProcAddress(gole32, "CoCreateInstanceEx");
     if (!gCoCreateInstanceEx)
         rb_raise(rb_eRuntimeError, "CoCreateInstanceEx is not supported in this environment");
-    rb_scan_args(argc, argv, "2*", &ole, &host, &others);
 
     pbuf  = ole_vstr2wc(ole);
     hr = CLSIDFromProgID(pbuf, &clsid);
@@ -3250,7 +3248,7 @@ fole_initialize(int argc, VALUE *argv, VALUE self)
             rb_raise(rb_eSecurityError, "Insecure Object Creation - %s",
                      StringValuePtr(svr_name));
         }
-        return ole_create_dcom(argc, argv, self);
+        return ole_create_dcom(self, svr_name, host, others);
     }
 
     /* get CLSID from OLE server name */
diff --git a/version.h b/version.h
index c61d2346b9..bb5209e08f 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.0.0"
 #define RUBY_RELEASE_DATE "2014-09-05"
-#define RUBY_PATCHLEVEL 554
+#define RUBY_PATCHLEVEL 555
 
 #define RUBY_RELEASE_YEAR 2014
 #define RUBY_RELEASE_MONTH 9