diff --git a/core/sys/ctimer.c b/core/sys/ctimer.c
index ebf5dba89..c72f247f5 100644
--- a/core/sys/ctimer.c
+++ b/core/sys/ctimer.c
@@ -111,7 +111,6 @@ ctimer_set(struct ctimer *c, clock_time_t t,
     c->etimer.timer.interval = t;
   }
 
-  list_remove(ctimer_list, c);
   list_add(ctimer_list, c);
 }
 /*---------------------------------------------------------------------------*/
@@ -124,7 +123,6 @@ ctimer_reset(struct ctimer *c)
     PROCESS_CONTEXT_END(&ctimer_process);
   }
 
-  list_remove(ctimer_list, c);
   list_add(ctimer_list, c);
 }
 /*---------------------------------------------------------------------------*/
@@ -137,7 +135,6 @@ ctimer_restart(struct ctimer *c)
     PROCESS_CONTEXT_END(&ctimer_process);
   }
 
-  list_remove(ctimer_list, c);
   list_add(ctimer_list, c);
 }
 /*---------------------------------------------------------------------------*/