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-rw-r--r--src/basic/time-util.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/basic/time-util.c b/src/basic/time-util.c
index 7ca764abeb..c16460a198 100644
--- a/src/basic/time-util.c
+++ b/src/basic/time-util.c
@@ -47,12 +47,15 @@ static clockid_t map_clock_id(clockid_t c) {
/* Some more exotic archs (s390, ppc, …) lack the "ALARM" flavour of the clocks. Thus, clock_gettime() will
* fail for them. Since they are essentially the same as their non-ALARM pendants (their only difference is
* when timers are set on them), let's just map them accordingly. This way, we can get the correct time even on
- * those archs. */
+ * those archs.
+ *
+ * Also, older kernels don't support CLOCK_BOOTTIME: fall back to CLOCK_MONOTONIC. */
switch (c) {
+ case CLOCK_BOOTTIME:
case CLOCK_BOOTTIME_ALARM:
- return CLOCK_BOOTTIME;
+ return clock_boottime_or_monotonic ();
case CLOCK_REALTIME_ALARM:
return CLOCK_REALTIME;