diff --git a/pgtype/pgtype.go b/pgtype/pgtype.go
index 4c2532d23..08833f876 100644
--- a/pgtype/pgtype.go
+++ b/pgtype/pgtype.go
@@ -81,6 +81,8 @@ const (
 	IntervalOID            = 1186
 	IntervalArrayOID       = 1187
 	NumericArrayOID        = 1231
+	TimetzOID              = 1266
+	TimetzArrayOID         = 1270
 	BitOID                 = 1560
 	BitArrayOID            = 1561
 	VarbitOID              = 1562