diff --git a/src/backend/utils/adt/uuid.c b/src/backend/utils/adt/uuid.c
index bce7309c183..a746388b073 100644
--- a/src/backend/utils/adt/uuid.c
+++ b/src/backend/utils/adt/uuid.c
@@ -752,7 +752,7 @@ uuid_extract_timestamp(PG_FUNCTION_ARGS)
 			+ (((uint64) uuid->data[0]) << 40);
 
 		/* convert ms to us, then adjust */
-		ts = (TimestampTz) (tms * NS_PER_US) -
+		ts = (TimestampTz) (tms * US_PER_MS) -
 			(POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY * USECS_PER_SEC;
 
 		PG_RETURN_TIMESTAMPTZ(ts);