diff --git a/klippy/mcu.py b/klippy/mcu.py
index 7f1f7f51..2209ce4e 100644
--- a/klippy/mcu.py
+++ b/klippy/mcu.py
@@ -567,6 +567,9 @@ class MCU:
             if start_reason == 'firmware_restart':
                 raise error("Failed automated reset of MCU '%s'" % (self._name,))
         if self._config_crc != config_params['crc']:
+            if config_params['is_shutdown']:
+                raise error("Can not update MCU '%s' config as it is shutdown"
+                            % (self._name,))
             self._check_restart("CRC mismatch")
             raise error("MCU '%s' CRC does not match config" % (self._name,))
         move_count = config_params['move_count']
diff --git a/src/basecmd.c b/src/basecmd.c
index 08dc6ec2..8ce7a27c 100644
--- a/src/basecmd.c
+++ b/src/basecmd.c
@@ -201,8 +201,8 @@ static uint32_t config_crc;
 void
 command_get_config(uint32_t *args)
 {
-    sendf("config is_config=%c crc=%u move_count=%hu"
-          , is_finalized(), config_crc, move_count);
+    sendf("config is_config=%c crc=%u move_count=%hu is_shutdown=%c"
+          , is_finalized(), config_crc, move_count, sched_is_shutdown());
 }
 DECL_COMMAND_FLAGS(command_get_config, HF_IN_SHUTDOWN, "get_config");