diff --git a/os/various/lwip_bindings/arch/sys_arch.c b/os/various/lwip_bindings/arch/sys_arch.c
index e9a844ac8..0b22c4c81 100644
--- a/os/various/lwip_bindings/arch/sys_arch.c
+++ b/os/various/lwip_bindings/arch/sys_arch.c
@@ -84,7 +84,7 @@ err_t sys_sem_new(sys_sem_t *sem, u8_t count) {
   }
   else {
     chSemInit(*sem, (cnt_t)count);
-    SYS_STATS_INC(sem.used);
+    SYS_STATS_INC_USED(sem);
     return ERR_OK;
   }
 }
diff --git a/readme.txt b/readme.txt
index 7b51b7ad5..9ff199c15 100644
--- a/readme.txt
+++ b/readme.txt
@@ -79,6 +79,7 @@
 *****************************************************************************
 
 *** 2.4.3 ***
+- FIX: Fixed problem with lwIP statistics (bug 3564134).
 - FIX: Fixed packed structures macros not functional in IAR and RVCT port
   (bug 3561279).
 - FIX: Fixed Problem in FatFs demos related to LFN (bug 3560980).