diff --git a/src/core/timeouts.c b/src/core/timeouts.c
index 34aad13a..a06f8028 100644
--- a/src/core/timeouts.c
+++ b/src/core/timeouts.c
@@ -272,6 +272,15 @@ void sys_timeouts_init(void)
   }
 }
 
+/** Deinitialize this module */
+void sys_timeouts_deinit(void)
+{
+  size_t i;
+  /* tcp_tmr() at index 0 is started on demand */
+  for (i = (LWIP_TCP ? 1 : 0); i < LWIP_ARRAYSIZE(lwip_cyclic_timers); i++) {
+    sys_untimeout(lwip_cyclic_timer, LWIP_CONST_CAST(void *, &lwip_cyclic_timers[i]));
+  }
+}
 /**
  * Create a one-shot timer (aka timeout). Timeouts are processed in the
  * following cases:
diff --git a/src/include/lwip/timeouts.h b/src/include/lwip/timeouts.h
index b601f9eb..1791f54c 100644
--- a/src/include/lwip/timeouts.h
+++ b/src/include/lwip/timeouts.h
@@ -101,6 +101,7 @@ struct sys_timeo {
 };
 
 void sys_timeouts_init(void);
+void sys_timeouts_deinit(void);
 
 #if LWIP_DEBUG_TIMERNAMES
 void sys_timeout_debug(u32_t msecs, sys_timeout_handler handler, void *arg, const char* handler_name);