metainfo/bep47.go    | 8 ++++++++
 metainfo/fileinfo.go | 8 ++++++--
 metainfo/info.go     | 5 +++--

diff --git a/metainfo/bep47.go b/metainfo/bep47.go
new file mode 100644
index 0000000000000000000000000000000000000000..884d88d65a4d68bce5484224ca41403afc509028
--- /dev/null
+++ b/metainfo/bep47.go
@@ -0,0 +1,8 @@
+package metainfo
+
+// See BEP 47. This is common to both Info and FileInfo.
+type ExtendedFileAttrs struct {
+	Attr        string   `bencode:"attr,omitempty"`
+	SymlinkPath []string `bencode:"symlink path,omitempty"`
+	Sha1        string   `bencode:"sha1,omitempty"`
+}
diff --git a/metainfo/fileinfo.go b/metainfo/fileinfo.go
index 2a5ea01d1f88d476d80a9622b4fb6d601243bbd9..894018c10815a32a74be61291a48d05fea0c07e7 100644
--- a/metainfo/fileinfo.go
+++ b/metainfo/fileinfo.go
@@ -4,9 +4,13 @@ import "strings"
 
 // Information specific to a single file inside the MetaInfo structure.
 type FileInfo struct {
-	Length   int64    `bencode:"length"` // BEP3
-	Path     []string `bencode:"path"`   // BEP3
+	// BEP3. With BEP 47 this can be optional, but we have no way to describe that without breaking
+	// the API.
+	Length   int64    `bencode:"length"`
+	Path     []string `bencode:"path"` // BEP3
 	PathUtf8 []string `bencode:"path.utf-8,omitempty"`
+
+	ExtendedFileAttrs
 }
 
 func (fi *FileInfo) DisplayPath(info *Info) string {
diff --git a/metainfo/info.go b/metainfo/info.go
index 5eedfa3b4c41730ddb92543abfb855ad635e27e4..b5e4d6e179595574c143778469d245b2b2438805 100644
--- a/metainfo/info.go
+++ b/metainfo/info.go
@@ -17,8 +17,9 @@ 	PieceLength int64  `bencode:"piece length"` // BEP3
 	Pieces      []byte `bencode:"pieces"`       // BEP3
 	Name        string `bencode:"name"`         // BEP3
 	NameUtf8    string `bencode:"name.utf-8,omitempty"`
-	Length      int64  `bencode:"length,omitempty"`  // BEP3, mutually exclusive with Files
-	Private     *bool  `bencode:"private,omitempty"` // BEP27
+	Length      int64  `bencode:"length,omitempty"` // BEP3, mutually exclusive with Files
+	ExtendedFileAttrs
+	Private *bool `bencode:"private,omitempty"` // BEP27
 	// TODO: Document this field.
 	Source string     `bencode:"source,omitempty"`
 	Files  []FileInfo `bencode:"files,omitempty"` // BEP3, mutually exclusive with Length