diff --git a/src/corelib/io/io.pri b/src/corelib/io/io.pri
index f651860e08..7afff7ff81 100644
--- a/src/corelib/io/io.pri
+++ b/src/corelib/io/io.pri
@@ -51,7 +51,6 @@ HEADERS +=  \
         io/qfileselector.h \
         io/qfileselector_p.h \
         io/qloggingcategory.h \
-        io/qloggingcategory_p.h \
         io/qloggingregistry_p.h
 
 SOURCES += \
diff --git a/src/corelib/io/qloggingcategory.cpp b/src/corelib/io/qloggingcategory.cpp
index 63241f6698..a368e92932 100644
--- a/src/corelib/io/qloggingcategory.cpp
+++ b/src/corelib/io/qloggingcategory.cpp
@@ -40,7 +40,6 @@
 ****************************************************************************/
 
 #include "qloggingcategory.h"
-#include "qloggingcategory_p.h"
 #include "qloggingregistry_p.h"
 
 QT_BEGIN_NAMESPACE
@@ -221,15 +220,10 @@ void QLoggingCategory::init(const char *category, QtMsgType severityLevel)
 {
     enabled.store(0x01010101);   // enabledDebug = enabledWarning = enabledCritical = true;
 
-    const bool isDefaultCategory
-            = (category == 0) || (strcmp(category, qtDefaultCategoryName) == 0);
-
-    // normalize "default" category name, so that we can just do
-    // pointer comparison in QLoggingRegistry::updateCategory
-    if (isDefaultCategory)
-        name = qtDefaultCategoryName;
-    else
+    if (category)
         name = category;
+    else
+        name = qtDefaultCategoryName;
 
     if (QLoggingRegistry *reg = QLoggingRegistry::instance())
         reg->registerCategory(this, severityLevel);
diff --git a/src/corelib/io/qloggingcategory_p.h b/src/corelib/io/qloggingcategory_p.h
deleted file mode 100644
index 7802f017fd..0000000000
--- a/src/corelib/io/qloggingcategory_p.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of the QtCore module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and Digia.  For licensing terms and
-** conditions see http://qt.digia.com/licensing.  For further information
-** use the contact form at http://qt.digia.com/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 2.1 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL included in the
-** packaging of this file.  Please review the following information to
-** ensure the GNU Lesser General Public License version 2.1 requirements
-** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Digia gives you certain additional
-** rights.  These rights are described in the Digia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3.0 as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL included in the
-** packaging of this file.  Please review the following information to
-** ensure the GNU General Public License version 3.0 requirements will be
-** met: http://www.gnu.org/copyleft/gpl.html.
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QLOGGINGCATEGORY_P_H
-#define QLOGGINGCATEGORY_P_H
-
-//
-//  W A R N I N G
-//  -------------
-//
-// This file is not part of the Qt API.  It exists for the convenience
-// of a number of Qt sources files.  This header file may change from
-// version to version without notice, or even be removed.
-//
-// We mean it.
-//
-
-#include <QtCore/qglobal.h>
-
-QT_BEGIN_NAMESPACE
-
-// unique pointer to default category
-// (allows to compare for pointers instead of strings)
-extern const char qtDefaultCategoryName[];
-
-QT_END_NAMESPACE
-
-#endif // QLOGGINGCATEGORY_P_H
diff --git a/src/corelib/io/qloggingregistry.cpp b/src/corelib/io/qloggingregistry.cpp
index dd1612c6b4..3ce0a571b4 100644
--- a/src/corelib/io/qloggingregistry.cpp
+++ b/src/corelib/io/qloggingregistry.cpp
@@ -40,7 +40,6 @@
 ****************************************************************************/
 
 #include "qloggingregistry_p.h"
-#include "qloggingcategory_p.h"
 
 #include <QtCore/qfile.h>
 #include <QtCore/qstandardpaths.h>