diff --git a/os/hal/ports/simulator/hal_pal_lld.c b/os/hal/ports/simulator/hal_pal_lld.c
index d3d509ec8..41b963bdc 100644
--- a/os/hal/ports/simulator/hal_pal_lld.c
+++ b/os/hal/ports/simulator/hal_pal_lld.c
@@ -83,6 +83,7 @@ void _pal_lld_setgroupmode(ioportid_t port,
     break;
   case PAL_MODE_UNCONNECTED:
     port->latch |= mask;
+    /* FALLTHROUGH */
   case PAL_MODE_OUTPUT_PUSHPULL:
     port->dir |= mask;
     break;
diff --git a/readme.txt b/readme.txt
index ab825b506..9825c5c5b 100644
--- a/readme.txt
+++ b/readme.txt
@@ -126,6 +126,8 @@
 - HAL: Added a new interface for range-finder devices (used by EX).
 - HAL: Added mcuconf.h updater tool for STM32F407 (backported to 19.1.1).
 - NIL: Integrated NIL 4.0.
+- FIX: Fixed warning in simulator PAL driver (bug #1047)
+       (backported to 19.1.4)(backported to 18.2.3).
 - FIX: Fixed board initialization failure on STM32F030x6 (bug #1046)
        (backported to 19.1.4)(backported to 18.2.3).
 - FIX: Fixed STM32 I2Cv1 BTF event not cleared (bug #1045)