diff --git a/api/state.go b/api/state.go
index 7a399a01e..a95ecfbca 100644
--- a/api/state.go
+++ b/api/state.go
@@ -19,7 +19,6 @@ import (
 	"bytes"
 	"crypto/sha256"
 	"encoding/binary"
-	"errors"
 	"fmt"
 )
 
@@ -67,10 +66,6 @@ type EntryBundle struct {
 	Entries [][]byte
 }
 
-func (t *EntryBundle) MarshalText() ([]byte, error) {
-	return nil, errors.New("unimplemented")
-}
-
 // UnmarshalText implements encoding/TextUnmarshaler and reads EntryBundles
 // which are encoded using the tlog-tiles spec.
 func (t *EntryBundle) UnmarshalText(raw []byte) error {