diff --git a/sys/include/xtimer/implementation.h b/sys/include/xtimer/implementation.h
index 107ac99e91c81da45fc39e93320c081c91bdd10b..3f070c001dd7e90c7e104e1780a88dfba2afa687 100644
--- a/sys/include/xtimer/implementation.h
+++ b/sys/include/xtimer/implementation.h
@@ -63,14 +63,13 @@ static inline uint32_t _xtimer_lltimer_mask(uint32_t val)
  */
 uint64_t _xtimer_now64(void);
 int _xtimer_set_absolute(xtimer_t *timer, uint32_t target);
-void _xtimer_set64(xtimer_t *timer, uint32_t offset, uint32_t long_offset);
 void _xtimer_set(xtimer_t *timer, uint32_t offset);
+void _xtimer_set64(xtimer_t *timer, uint32_t offset, uint32_t long_offset);
 void _xtimer_periodic_wakeup(uint32_t *last_wakeup, uint32_t period);
 void _xtimer_set_msg(xtimer_t *timer, uint32_t offset, msg_t *msg, kernel_pid_t target_pid);
 void _xtimer_set_msg64(xtimer_t *timer, uint64_t offset, msg_t *msg, kernel_pid_t target_pid);
 void _xtimer_set_wakeup(xtimer_t *timer, uint32_t offset, kernel_pid_t pid);
 void _xtimer_set_wakeup64(xtimer_t *timer, uint64_t offset, kernel_pid_t pid);
-void _xtimer_set(xtimer_t *timer, uint32_t offset);
 int _xtimer_msg_receive_timeout(msg_t *msg, uint32_t ticks);
 int _xtimer_msg_receive_timeout64(msg_t *msg, uint64_t ticks);