diff --git a/src/include/utils/timestamp.h b/src/include/utils/timestamp.h
index e14285f8a4613c3d955a22a36824087c099de19d..9e51b58dde0846e6b98e9b3569b7002b43641e0d 100644
--- a/src/include/utils/timestamp.h
+++ b/src/include/utils/timestamp.h
@@ -81,8 +81,6 @@ typedef struct
  */
 #define DAYS_PER_MONTH	30		/* assumes exactly 30 days per month */
 #define HOURS_PER_DAY	24		/* assume no daylight savings time changes */
-#define MINS_PER_HOUR	60		/* assume no daylight savings time changes */
-#define SECS_PER_MINUTE	60		/* assume no daylight savings time changes */
 
 /*
  *	This doesn't adjust for uneven daylight savings time intervals or leap