diff --git a/src/twn_util.c b/src/twn_util.c
index ff11302..fe624bf 100644
--- a/src/twn_util.c
+++ b/src/twn_util.c
@@ -224,7 +224,8 @@ TimerElapseSecondsResult timer_elapse_seconds(float seconds_left, float interval
     }
     return (TimerElapseSecondsResult) {
         .elapsed = elapsed,
-        .seconds_left = seconds_left
+        .seconds_left = seconds_left,
+        .interval = interval,
     };
 }