diff --git a/samples/memfs/memfs.go b/samples/memfs/memfs.go
index 4e8c3a5..40642d9 100644
--- a/samples/memfs/memfs.go
+++ b/samples/memfs/memfs.go
@@ -190,6 +190,28 @@ func (fs *memFS) deallocateInode(id fuseops.InodeID) {
 // FileSystem methods
 ////////////////////////////////////////////////////////////////////////
 
+func (fs *memFS) StatFS(
+	ctx context.Context,
+	op *fuseops.StatFSOp) (err error) {
+	fs.mu.Lock()
+	defer fs.mu.Unlock()
+
+	// Count free/available bytes and inodes.
+	op.BlockSize = 1
+	op.BlocksFree = Capacity_Bytes
+	op.BlocksAvailable = Capacity_Bytes
+	op.Inodes = Capacity_Files
+	op.InodesFree = Capacity_Files
+
+	for _, in := range fs.inodes {
+		op.InodesFree--
+		op.BlocksFree -= in.attrs.Size
+		op.BlocksAvailable -= in.attrs.Size
+	}
+
+	return
+}
+
 func (fs *memFS) LookUpInode(
 	ctx context.Context,
 	op *fuseops.LookUpInodeOp) (err error) {