diff --git a/apis/field_error.go b/apis/field_error.go
index 4ae02bc1e..e3c3ae4e8 100644
--- a/apis/field_error.go
+++ b/apis/field_error.go
@@ -192,7 +192,7 @@ func asKey(key string) string {
 //   err([0]).ViaField(bar).ViaField(foo) -> foo.bar.[0] converts to foo.bar[0]
 //   err(bar).ViaIndex(0).ViaField(foo) -> foo.[0].bar converts to foo[0].bar
 //   err(bar).ViaField(foo).ViaIndex(0) -> [0].foo.bar converts to [0].foo.bar
-//   err(bar).ViaIndex(0).ViaIndex[1].ViaField(foo) -> foo.[1].[0].bar converts to foo[1][0].bar
+//   err(bar).ViaIndex(0).ViaIndex(1).ViaField(foo) -> foo.[1].[0].bar converts to foo[1][0].bar
 func flatten(path []string) string {
 	var newPath []string
 	for _, part := range path {
@@ -300,6 +300,12 @@ func ErrDisallowedFields(fieldPaths ...string) *FieldError {
 	}
 }
 
+// ErrInvalidArrayValue consturcts a FieldError for a repetetive `field`
+// at `index` that has received an invalid string value.
+func ErrInvalidArrayValue(value, field string, index int) *FieldError {
+	return ErrInvalidValue(value, CurrentField).ViaFieldIndex(field, index)
+}
+
 // ErrInvalidValue constructs a FieldError for a field that has received an
 // invalid string value.
 func ErrInvalidValue(value, fieldPath string) *FieldError {
diff --git a/apis/field_error_test.go b/apis/field_error_test.go
index 1b80fff8b..7e6407ab4 100644
--- a/apis/field_error_test.go
+++ b/apis/field_error_test.go
@@ -21,6 +21,8 @@ import (
 	"strconv"
 	"strings"
 	"testing"
+
+	"github.com/google/go-cmp/cmp"
 )
 
 func TestFieldError(t *testing.T) {
@@ -389,6 +391,12 @@ can not use @, do not try`,
 			return err
 		}(),
 		want: "invalid field(s): jar[0][E].baz[1].bar[A].faa, jar[0][E].baz[1].bar[A].foo",
+	}, {
+		name: "leaf field error with index",
+		err: func() *FieldError {
+			return ErrInvalidArrayValue("kapot", "indexed", 5)
+		}(),
+		want: `invalid value "kapot": indexed[5]`,
 	}, {
 		name:     "nil propagation",
 		err:      nil,
@@ -421,7 +429,7 @@ can not use @, do not try`,
 
 			if test.want != "" {
 				if got, want := fe.Error(), test.want; got != want {
-					t.Errorf("%s: Error() = %v, wanted %v", test.name, got, want)
+t.Errorf("%s: Error() = %q, wanted %q, diff: %s", test.name, got, want, cmp.Diff(got, want))
 				}
 			} else if fe != nil {
 				t.Errorf("%s: ViaField() = %v, wanted nil", test.name, fe)