diff --git a/os/kernel/include/chfiles.h b/os/kernel/include/chfiles.h
index 59f902806..0a1e84e4d 100644
--- a/os/kernel/include/chfiles.h
+++ b/os/kernel/include/chfiles.h
@@ -141,7 +141,7 @@ typedef struct {
  *
  * @api
  */
-#define chFileStreamGetSize(ip) ((ip)->vmt->getposition(ip))
+#define chFileStreamGetSize(ip) ((ip)->vmt->getsize(ip))
 
 /**
  * @brief   Returns the current file pointer position.
diff --git a/readme.txt b/readme.txt
index b43e9cece..7b07dfb3f 100644
--- a/readme.txt
+++ b/readme.txt
@@ -79,6 +79,7 @@
 *****************************************************************************
 
 *** 2.4.3 ***
+- FIX: Fixed bug in abstract file interface (bug 3579660).
 - FIX: Fixed various typos and wrong limits in the STM32F4/F2 HAL driver
   (bug 3578944).
 - FIX: Fixed ARM CMx crt0.c fails at low optimization levels (bug 3578927).