diff --git a/include/crm/common/iso8601.h b/include/crm/common/iso8601.h
index f46f3bc6ef..78f530babb 100644
--- a/include/crm/common/iso8601.h
+++ b/include/crm/common/iso8601.h
@@ -1,129 +1,130 @@
 /*
  * Copyright 2005-2020 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
  * This source code is licensed under the GNU Lesser General Public License
  * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
  */
 
 #ifndef PCMK__CRM_COMMON_ISO8601__H
 #  define PCMK__CRM_COMMON_ISO8601__H
 
 #  include <time.h>
 #  include <ctype.h>
 #  include <stdint.h>   // uint32_t
 #  include <stdbool.h>  // bool
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /**
  * \file
  * \brief ISO_8601 Date handling
  * \ingroup date
  */
 
 /*
  * See https://en.wikipedia.org/wiki/ISO_8601
  */
 
 typedef struct crm_time_s crm_time_t;
 
 typedef struct crm_time_period_s {
     crm_time_t *start;
     crm_time_t *end;
     crm_time_t *diff;
 } crm_time_period_t;
 
 /* Creates a new date/time object conforming to ISO 8601, for example:
  *   Ordinal:   2010-01 12:00:00 +10:00
  *   Gregorian: 2010-01-01 12:00:00 +10:00
  *   ISO Week:  2010-W53-6 12:00:00 +10:00
  *
  * Notes:
  *   Only one of date, time is required
  *   If date or timezone is unspecified, they default to the current one
  *   Supplying NULL results in the current date/time
  *   Dashes may be omitted from dates
  *   Colons may be omitted from times and timezones
  *   A timezone of 'Z' denotes UTC time
  */
 crm_time_t *crm_time_new(const char *string);
 crm_time_t *crm_time_new_undefined(void);
 void crm_time_free(crm_time_t * dt);
 
 bool crm_time_is_defined(const crm_time_t *t);
 char *crm_time_as_string(const crm_time_t *dt, int flags);
 
 #define crm_time_log(level, prefix, dt, flags)  \
     crm_time_log_alias(level, __FILE__, __func__, __LINE__, prefix, dt, flags)
 
 void crm_time_log_alias(int log_level, const char *file, const char *function,
                         int line, const char *prefix,
                         const crm_time_t *date_time, int flags);
 
 #  define crm_time_log_date          0x001
 #  define crm_time_log_timeofday     0x002
 #  define crm_time_log_with_timezone 0x004
 #  define crm_time_log_duration      0x008
 
 #  define crm_time_ordinal           0x010
 #  define crm_time_weeks             0x020
 #  define crm_time_seconds           0x100
 #  define crm_time_epoch             0x200
+#  define crm_time_usecs             0x400
 
 crm_time_t *crm_time_parse_duration(const char *duration_str);
 crm_time_t *crm_time_calculate_duration(const crm_time_t *dt,
                                         const crm_time_t *value);
 crm_time_period_t *crm_time_parse_period(const char *period_str);
 void crm_time_free_period(crm_time_period_t *period);
 
 int crm_time_compare(const crm_time_t *a, const crm_time_t *b);
 
 int crm_time_get_timeofday(const crm_time_t *dt, uint32_t *h, uint32_t *m,
                            uint32_t *s);
 int crm_time_get_timezone(const crm_time_t *dt, uint32_t *h, uint32_t *m);
 int crm_time_get_gregorian(const crm_time_t *dt, uint32_t *y, uint32_t *m,
                            uint32_t *d);
 int crm_time_get_ordinal(const crm_time_t *dt, uint32_t *y, uint32_t *d);
 int crm_time_get_isoweek(const crm_time_t *dt, uint32_t *y, uint32_t *w,
                          uint32_t * d);
 
 /* Time in seconds since 0000-01-01 00:00:00Z */
 long long crm_time_get_seconds(const crm_time_t *dt);
 
 /* Time in seconds since 1970-01-01 00:00:00Z */
 long long crm_time_get_seconds_since_epoch(const crm_time_t *dt);
 
 void crm_time_set(crm_time_t *target, const crm_time_t *source);
 void crm_time_set_timet(crm_time_t *target, const time_t *source);
 
 /* Returns a new time object */
 crm_time_t *pcmk_copy_time(const crm_time_t *source);
 crm_time_t *crm_time_add(const crm_time_t *dt, const crm_time_t *value);
 crm_time_t *crm_time_subtract(const crm_time_t *dt, const crm_time_t *value);
 
 /* All crm_time_add_... functions support negative values */
 void crm_time_add_seconds(crm_time_t * dt, int value);
 void crm_time_add_minutes(crm_time_t * dt, int value);
 void crm_time_add_hours(crm_time_t * dt, int value);
 void crm_time_add_days(crm_time_t * dt, int value);
 void crm_time_add_weeks(crm_time_t * dt, int value);
 void crm_time_add_months(crm_time_t * dt, int value);
 void crm_time_add_years(crm_time_t * dt, int value);
 
 /* Useful helper functions */
 int crm_time_january1_weekday(int year);
 int crm_time_weeks_in_year(int year);
 int crm_time_days_in_month(int month, int year);
 
 bool crm_time_leapyear(int year);
 bool crm_time_check(const crm_time_t *dt);
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif