diff --git a/fs/copy.go b/fs/copy.go
index 8c44c7c..f7a8606 100644
--- a/fs/copy.go
+++ b/fs/copy.go
@@ -17,9 +17,9 @@ var (
 	}
 )
 
-// CopyDirectory copies the directory from src to dst.
+// CopyDir copies the directory from src to dst.
 // Most efficient copy of files is attempted.
-func CopyDirectory(dst, src string) error {
+func CopyDir(dst, src string) error {
 	inodes := map[uint64]string{}
 	return copyDirectory(dst, src, inodes)
 }
diff --git a/fs/copy_test.go b/fs/copy_test.go
index d63be66..0e7cac0 100644
--- a/fs/copy_test.go
+++ b/fs/copy_test.go
@@ -45,7 +45,7 @@ func testCopy(apply fstest.Applier) error {
 		return errors.Wrap(err, "failed to apply changes")
 	}
 
-	if err := CopyDirectory(t2, t1); err != nil {
+	if err := CopyDir(t2, t1); err != nil {
 		return errors.Wrap(err, "failed to copy")
 	}
 
diff --git a/fs/diff_test.go b/fs/diff_test.go
index fb8f012..5eca394 100644
--- a/fs/diff_test.go
+++ b/fs/diff_test.go
@@ -164,7 +164,7 @@ func testDiffWithBase(base, diff fstest.Applier, expected []testChange) error {
 		return errors.Wrap(err, "failed to apply base filesytem")
 	}
 
-	if err := CopyDirectory(t2, t1); err != nil {
+	if err := CopyDir(t2, t1); err != nil {
 		return errors.Wrap(err, "failed to copy base directory")
 	}
 
diff --git a/snapshot/naive/naive.go b/snapshot/naive/naive.go
index bf48583..9099d2b 100644
--- a/snapshot/naive/naive.go
+++ b/snapshot/naive/naive.go
@@ -66,7 +66,7 @@ func (n *Naive) Prepare(dst, parent string) ([]containerd.Mount, error) {
 		}
 
 		// Now, we copy the parent filesystem, just a directory, into dst.
-		if err := fs.CopyDirectory(dst, filepath.Join(parent, "data")); err != nil {
+		if err := fs.CopyDir(dst, filepath.Join(parent, "data")); err != nil {
 			return nil, errors.Wrap(err, "copying of parent failed")
 		}
 	}
@@ -88,7 +88,7 @@ func (n *Naive) Commit(diff, dst string) error {
 
 	// Move the data into our metadata directory, we could probably save disk
 	// space if we just saved the diff, but let's get something working.
-	if err := fs.CopyDirectory(filepath.Join(active.metadata, "data"), dst); err != nil {
+	if err := fs.CopyDir(filepath.Join(active.metadata, "data"), dst); err != nil {
 		return errors.Wrap(err, "copying of parent failed")
 	}