diff --git a/fuseops/ops.go b/fuseops/ops.go
index 009cfe9..70f9622 100644
--- a/fuseops/ops.go
+++ b/fuseops/ops.go
@@ -42,7 +42,7 @@ import (
 // it, the file system will not successfully mount. If you don't model a sane
 // amount of free space, the Finder will refuse to copy files into the file
 // system.
-type StatfsOp struct {
+type StatFSOp struct {
 	// The size of the file system's blocks, and how many there are in total.
 	BlockSize uint32
 	Blocks    uint64
diff --git a/fuseutil/file_system.go b/fuseutil/file_system.go
index 3ebcdf8..3a9b539 100644
--- a/fuseutil/file_system.go
+++ b/fuseutil/file_system.go
@@ -35,6 +35,7 @@ import (
 // See NotImplementedFileSystem for a convenient way to embed default
 // implementations for methods you don't care about.
 type FileSystem interface {
+	StatFS(context.Context, *fuseops.StatFSOp) error
 	LookUpInode(context.Context, *fuseops.LookUpInodeOp) error
 	GetInodeAttributes(context.Context, *fuseops.GetInodeAttributesOp) error
 	SetInodeAttributes(context.Context, *fuseops.SetInodeAttributesOp) error
diff --git a/fuseutil/not_implemented_file_system.go b/fuseutil/not_implemented_file_system.go
index 41f3a6d..4bd923c 100644
--- a/fuseutil/not_implemented_file_system.go
+++ b/fuseutil/not_implemented_file_system.go
@@ -29,6 +29,13 @@ type NotImplementedFileSystem struct {
 
 var _ FileSystem = &NotImplementedFileSystem{}
 
+func (fs *NotImplementedFileSystem) StatFS(
+	ctx context.Context,
+	op *fuseops.StatFSOp) (err error) {
+	err = fuse.ENOSYS
+	return
+}
+
 func (fs *NotImplementedFileSystem) LookUpInode(
 	ctx context.Context,
 	op *fuseops.LookUpInodeOp) (err error) {