diff --git a/sys/xtimer/xtimer_core.c b/sys/xtimer/xtimer_core.c
index 236a6f0408..59d22560c5 100644
--- a/sys/xtimer/xtimer_core.c
+++ b/sys/xtimer/xtimer_core.c
@@ -169,7 +169,8 @@ static inline void _schedule_earliest_lltimer(uint32_t now)
 }
 
 /**
- * @brief compare two timers. return true if timerA expires earlier than or equal to timerB and false otherwise.
+ * @brief   compare two timers. return true if timerA expires earlier than or
+ *          equal to timerB and false otherwise.
  */
 static bool _timer_comparison(xtimer_t* timerA, xtimer_t* timerB, uint32_t now)
 {
@@ -278,7 +279,7 @@ static inline void _update_short_timers(uint64_t *now)
 
             /* make sure we don't fire too early */
             if (timer->offset > elapsed) {
-                while(_xtimer_now() - timer->start_time < timer->offset) {}
+                while (_xtimer_now() - timer->start_time < timer->offset) {}
             }
             /* advance list */
             timer_list_head = timer->next;