1 files changed, 2 insertions, 2 deletions
diff --git a/src/core/timer.h b/src/core/timer.h
index 57a514a68c..10d3ce1116 100644
--- a/src/core/timer.h
+++ b/src/core/timer.h
@@ -52,8 +52,8 @@ typedef struct TimerValue {
         bool disabled;
         clockid_t clock_id;
 
-        usec_t value;
-        CalendarSpec *calendar_spec;
+        usec_t value; /* only for monotonic events */
+        CalendarSpec *calendar_spec; /* only for calendar events */
         usec_t next_elapse;
 
         LIST_FIELDS(struct TimerValue, value);