* "NTP timestamps are represented as a 64-bit unsigned fixed-point number,
* in seconds relative to 0h on 1 January 1900."
*/
-#define OFFSET_1900_1970 2208988800UL
+#define OFFSET_1900_1970 UINT64_C(2208988800)
#define RETRY_USEC (30*USEC_PER_SEC)
#define RATELIMIT_INTERVAL_USEC (10*USEC_PER_SEC)