diff --git a/internal/restic/id.go b/internal/restic/id.go
index 6d85ed68a..5a25e0ebe 100644
--- a/internal/restic/id.go
+++ b/internal/restic/id.go
@@ -82,19 +82,6 @@ func (id ID) Equal(other ID) bool {
 	return id == other
 }
 
-// EqualString compares this ID to another one, given as a string.
-func (id ID) EqualString(other string) (bool, error) {
-	s, err := hex.DecodeString(other)
-	if err != nil {
-		return false, errors.Wrap(err, "hex.DecodeString")
-	}
-
-	id2 := ID{}
-	copy(id2[:], s)
-
-	return id == id2, nil
-}
-
 // MarshalJSON returns the JSON encoding of id.
 func (id ID) MarshalJSON() ([]byte, error) {
 	buf := make([]byte, 2+hex.EncodedLen(len(id)))
diff --git a/internal/restic/id_test.go b/internal/restic/id_test.go
index ff1dc54e0..9a9fddcda 100644
--- a/internal/restic/id_test.go
+++ b/internal/restic/id_test.go
@@ -30,14 +30,6 @@ func TestID(t *testing.T) {
 			t.Errorf("ID.Equal() does not work as expected")
 		}
 
-		ret, err := id.EqualString(test.id)
-		if err != nil {
-			t.Error(err)
-		}
-		if !ret {
-			t.Error("ID.EqualString() returned wrong value")
-		}
-
 		// test json marshalling
 		buf, err := id.MarshalJSON()
 		if err != nil {