diff --git a/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.c b/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.c
index 0bef8b2ae..bc9190984 100644
--- a/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.c
+++ b/os/hal/ports/STM32/LLD/CANv1/hal_can_lld.c
@@ -80,7 +80,8 @@ static void can_lld_set_filters(uint32_t can2sb,
   rccEnableCAN1(FALSE);
 
   /* Filters initialization.*/
-  CAN1->FMR = (CAN1->FMR & 0xFFFF0000) | (can2sb << 8) | CAN_FMR_FINIT;
+  CAN1->FMR = (CAN1->FMR & 0xFFFF0000) | CAN_FMR_FINIT;
+  CAN1->FMR |=  (can2sb << 8);
   if (num > 0) {
     uint32_t i, fmask;
 
diff --git a/readme.txt b/readme.txt
index eed9540d3..60f3f8646 100644
--- a/readme.txt
+++ b/readme.txt
@@ -123,8 +123,9 @@
 - RT:  Merged RT4.
 - NIL: Merged NIL2.
 - NIL: Added STM32F7 demo.
-- HAL: Fixed wrong bit mask in STM32L0xx port (bug #769) (backported to 16.1.6)
-       (bug #768)(backported to 16.1.6).
+- HAL: Fixed STM32 CAN filters initialization problem (bug #770)(backported
+       to 16.1.6, 3.0.6, 2.6.10).
+- HAL: Fixed wrong bit mask in STM32L0xx port (bug #769)(backported to 16.1.6).
 - HAL: Fixed potential wait states problem in STM32L4 initialization code
        (bug #768)(backported to 16.1.6).
 - HAL: Fixed SDIO driver not compiling on STM32F446 devices (bug #767)