diff --git a/event.c b/event.c
index cd8a096b..7ce71168 100644
--- a/event.c
+++ b/event.c
@@ -2087,8 +2087,8 @@ event_add_internal(struct event *ev, const struct timeval *tv,
 		}
 
 		event_debug((
-			 "event_add: timeout in %d seconds, call %p",
-			 (int)tv->tv_sec, ev->ev_callback));
+			 "event_add: timeout in %d seconds %d useconds, call %p",
+			 (int)tv->tv_sec, (int)tv->tv_usec, ev->ev_callback));
 
 		event_queue_reinsert_timeout(base, ev);