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diff --git a/subversion/include/svn_dso.h b/subversion/include/svn_dso.h
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+/**
+ * @copyright
+ * ====================================================================
+ *    Licensed to the Apache Software Foundation (ASF) under one
+ *    or more contributor license agreements.  See the NOTICE file
+ *    distributed with this work for additional information
+ *    regarding copyright ownership.  The ASF licenses this file
+ *    to you under the Apache License, Version 2.0 (the
+ *    "License"); you may not use this file except in compliance
+ *    with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing,
+ *    software distributed under the License is distributed on an
+ *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *    KIND, either express or implied.  See the License for the
+ *    specific language governing permissions and limitations
+ *    under the License.
+ * ====================================================================
+ * @endcopyright
+ *
+ * @file svn_dso.h
+ * @brief DSO loading routines
+ */
+
+
+
+#ifndef SVN_DSO_H
+#define SVN_DSO_H
+
+#include <apr_dso.h>
+
+#include "svn_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * Initialize the DSO loading routines.
+ *
+ * @note This should be called prior to the creation of any pool that
+ *       is passed to a function that comes from a DSO, otherwise you
+ *       risk having the DSO unloaded before all pool cleanup callbacks
+ *       that live in the DSO have been executed.  If it is not called
+ *       prior to @c svn_dso_load being used for the first time there
+ *       will be a best effort attempt made to initialize the subsystem,
+ *       but it will not be entirely thread safe and it risks running
+ *       into the previously mentioned problems with DSO unloading and
+ *       pool cleanup callbacks.
+ *
+ * Returns svn_error_t object with corresponding apr_err returned by
+ * underlying calls. In case of no error returns @c SVN_NO_ERROR.
+ *
+ * @since New in 1.6.
+ */
+svn_error_t *
+svn_dso_initialize2(void);
+
+/** The same as svn_dso_initialize2(), except that if there is an error this
+ * calls abort() instead of returning the error.
+ *
+ * @deprecated Provided for backwards compatibility with the 1.5 API.
+ *
+ * @since New in 1.4.
+ */
+SVN_DEPRECATED
+void
+svn_dso_initialize(void);
+
+
+#if APR_HAS_DSO
+
+/**
+ * Attempt to load @a libname, returning it in @a *dso.
+ *
+ * If @a libname cannot be loaded set @a *dso to NULL and return
+ * @c SVN_NO_ERROR.
+ *
+ * @note Due to pool lifetime issues DSOs are all loaded into a global
+ *       pool, so you must be certain that there is a bounded number of
+ *       them that will ever be loaded by the system, otherwise you will
+ *       leak memory.
+ *
+ * @since New in 1.4.
+ */
+svn_error_t *
+svn_dso_load(apr_dso_handle_t **dso,
+             const char *libname);
+
+#endif /* APR_HAS_DSO */
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* SVN_DSO_H */