diff --git a/pgtype/int8.go b/pgtype/int8.go
index bbdda6b8..00a8cd00 100644
--- a/pgtype/int8.go
+++ b/pgtype/int8.go
@@ -3,6 +3,7 @@ package pgtype
 import (
 	"database/sql/driver"
 	"encoding/binary"
+	"encoding/json"
 	"math"
 	"strconv"