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diff --git a/lv2/ns/ext/files/files.h b/lv2/ns/ext/files/files.h
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+/*
+  Copyright 2010-2011 David Robillard <d@drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+/**
+   @file files.h
+   C API for the LV2 Files extension <http://lv2plug.in/ns/ext/files>.
+*/
+
+#ifndef LV2_FILES_H
+#define LV2_FILES_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define LV2_FILES_URI                  "http://lv2plug.in/ns/ext/files"
+#define LV2_FILES_PATH_SUPPORT_URI     LV2_FILES_URI "#pathSupport"
+#define LV2_FILES_NEW_FILE_SUPPORT_URI LV2_FILES_URI "#newFileSupport"
+
+typedef void* LV2_Files_Host_Data;
+
+/**
+   files:pathSupport feature struct.
+   
+   To support this feature, the host MUST pass an LV2_Feature struct with @a
+   URI @ref LV2_FILES_PATH_SUPPORT_URI and @a data pointed to an instance of
+   this struct.
+*/
+typedef struct {
+
+	/**
+	   Opaque host data.
+	*/
+	LV2_Files_Host_Data host_data;
+
+	/**
+	   Map an absolute path to an abstract path for use in plugin state.
+	   @param host_data MUST be the @a host_data member of this struct.
+	   @param absolute_path The absolute path of a file.
+	   @return An abstract path suitable for use in plugin state.
+
+	   The plugin MUST use this function to map any paths that will be stored
+	   in plugin state.  The returned value is an abstract path which MAY not
+	   be an actual file system path; @ref absolute_path MUST be used to map it
+	   to an actual path in order to use the file.
+
+	   Hosts MAY map paths in any way (e.g. by creating symbolic links within
+	   the plugin's state directory or storing a list of referenced files for
+	   later export).  Plugins MUST NOT make any assumptions about abstract
+	   paths except that they can be mapped to an absolute path using @ref
+	   absolute_path.  Particularly when restoring from state, this absolute
+	   path MAY not be the same as the original absolute path, but the host
+	   MUST guarantee it refers to a file with contents equivalent to the
+	   original.
+
+	   This function may only be called within the context of
+	   LV2_Persist.save() or LV2_Persist.restore().  The caller is responsible
+	   for freeing the returned value.
+	*/
+	char* (*abstract_path)(LV2_Files_Host_Data host_data,
+	                       const char*         absolute_path);
+
+	/**
+	   Map an abstract path from plugin state to an absolute path.
+	   @param host_data MUST be the @a host_data member of this struct.
+	   @param abstract_path An abstract path (e.g. a path from plugin state).
+	   @return An absolute file system path.
+
+	   Since abstract paths are not necessarily actual file paths (or at least
+	   not necessarily absolute paths), this function MUST be used in order to
+	   actually open or otherwise use the file referred to by an abstract path.
+
+	   This function may only be called within the context of
+	   LV2_Persist.save() or LV2_Persist.restore().  The caller is responsible
+	   for freeing the returned value.
+	*/
+	char* (*absolute_path)(LV2_Files_Host_Data host_data,
+	                       const char*         abstract_path);
+
+} LV2_Files_Path_Support;
+
+/**
+   files:newFileSupport feature struct.
+   
+   To support this feature, the host MUST pass an LV2_Feature struct with @a
+   URI @ref LV2_FILES_NEW_FILE_SUPPORT_URI and @a data pointed to an instance
+   of this struct.
+*/
+typedef struct {
+
+	/**
+	   Opaque host data.
+	*/
+	LV2_Files_Host_Data host_data;
+
+	/**
+	   Return an absolute path the plugin may use to create a new file.
+	   @param host_data MUST be the @a host_data member of this struct.
+	   @param relative_path The relative path of the file.
+	   @return The absolute path to use for the new file.
+
+	   The plugin can assume @a relative_path is relative to a namespace
+	   dedicated to that plugin instance; hosts MUST ensure this, e.g. by
+	   giving each plugin instance its own state directory.  The returned path
+	   is absolute and thus suitable for creating and using a file, but NOT
+	   suitable for storing in plugin state (it MUST be mapped to an abstract
+	   path using @ref LV2_Files_Path_Support::abstract_path to do so).
+
+	   This function may be called from any non-realtime context.  The caller
+	   is responsible for freeing the returned value.
+	*/
+	char* (*new_file_path)(LV2_Files_Host_Data host_data,
+	                       const char*         relative_path);
+
+} LV2_Files_New_File_Support;
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* LV2_FILES_H */