1 files changed, 8 insertions, 0 deletions
diff --git a/hugofs/filter_fs.go b/hugofs/filter_fs.go
index ec3897d9e..351b4d0f7 100644
--- a/hugofs/filter_fs.go
+++ b/hugofs/filter_fs.go
@@ -121,6 +121,10 @@ func NewFilterFs(fs afero.Fs) (afero.Fs, error) {
 	return ffs, nil
 }
 
+var (
+	_ FilesystemUnwrapper = (*FilterFs)(nil)
+)
+
 // FilterFs is an ordered composite filesystem.
 type FilterFs struct {
 	fs afero.Fs
@@ -141,6 +145,10 @@ func (fs *FilterFs) Chown(n string, uid, gid int) error {
 	return syscall.EPERM
 }
 
+func (fs *FilterFs) UnwrapFilesystem() afero.Fs {
+	return fs.fs
+}
+
 func (fs *FilterFs) LstatIfPossible(name string) (os.FileInfo, bool, error) {
 	fi, b, err := lstatIfPossible(fs.fs, name)
 	if err != nil {