diff --git a/libdokan/emptyfs.go b/libdokan/emptyfs.go
index <HASH>..<HASH> 100644
--- a/libdokan/emptyfs.go
+++ b/libdokan/emptyfs.go
@@ -12,6 +12,8 @@ import (
 	"github.com/keybase/kbfs/dokan"
 )
 
+// Return dokan.ErrAccessDenied by default as that is a safe default.
+
 type emptyFile struct{}
 
 func (t emptyFile) Cleanup(fi *dokan.FileInfo) {
diff --git a/libdokan/folderlist.go b/libdokan/folderlist.go
index <HASH>..<HASH> 100644
--- a/libdokan/folderlist.go
+++ b/libdokan/folderlist.go
@@ -248,8 +248,8 @@ outer:
 	return nil
 }
 
-func (f *FolderList) lockedAddChild(name string, val fileOpener) {
-	f.mu.Lock()
-	f.folders[name] = val
-	f.mu.Unlock()
+func (fl *FolderList) lockedAddChild(name string, val fileOpener) {
+	fl.mu.Lock()
+	fl.folders[name] = val
+	fl.mu.Unlock()
 }
libdokan: Tiny cleanups