diff --git a/os/hal/platforms/STM32/can_lld.c b/os/hal/platforms/STM32/can_lld.c
index 382322fff..8afe43355 100644
--- a/os/hal/platforms/STM32/can_lld.c
+++ b/os/hal/platforms/STM32/can_lld.c
@@ -187,7 +187,7 @@ static void can_lld_rx1_handler(CANDriver *canp) {
     chSysLockFromIsr();
     while (chSemGetCounterI(&canp->rxsem) < 0)
       chSemSignalI(&canp->rxsem);
-    chEvtBroadcastFlagsI(&canp->rxfull_event, CAN_MAILBOX_TO_MASK(1));
+    chEvtBroadcastFlagsI(&canp->rxfull_event, CAN_MAILBOX_TO_MASK(2));
     chSysUnlockFromIsr();
   }
   if ((rf1r & CAN_RF1R_FOVR1) > 0) {
diff --git a/readme.txt b/readme.txt
index a9e3a6310..d1e4b089b 100644
--- a/readme.txt
+++ b/readme.txt
@@ -87,6 +87,7 @@
 
 *** 2.5.2 ***
 - FIX: Fixed surprising non-CRLF lines in source (bug 3607380).
+- FIX: Fixed STM32 CAN broadcast typo (bug 3606675).
 - FIX: Fixed STM32 CAN mailbox receive for second fifo (bug 3606673).
 - FIX: Fixed CAN_USE_SLEEP_MODE compilation problem (bug 3606616)(backported
   to 2.4.4)(backported to 2.2.10).