diff --git a/internal/dhcpsvc/db.go b/internal/dhcpsvc/db.go
index b247e653..f1ee7d55 100644
--- a/internal/dhcpsvc/db.go
+++ b/internal/dhcpsvc/db.go
@@ -106,6 +106,9 @@ func (srv *DHCPServer) dbLoad(ctx context.Context) (err error) {
 
 		return nil
 	}
+	defer func() {
+		err = errors.WithDeferred(err, file.Close())
+	}()
 
 	dl := &dataLeases{}
 	err = json.NewDecoder(file).Decode(dl)
diff --git a/internal/dhcpsvc/server_test.go b/internal/dhcpsvc/server_test.go
index 02e64c3b..181161a6 100644
--- a/internal/dhcpsvc/server_test.go
+++ b/internal/dhcpsvc/server_test.go
@@ -20,7 +20,7 @@ import (
 var testdata = os.DirFS("testdata")
 
 // newTempDB copies the leases database file located in the testdata FS, under
-// tb.Name()/leases.db, to a temporary directory and returns the path to the
+// tb.Name()/leases.json, to a temporary directory and returns the path to the
 // copied file.
 func newTempDB(tb testing.TB) (dst string) {
 	tb.Helper()