diff --git a/klippy/console.py b/klippy/console.py
index dfb4262f..1610c4d0 100755
--- a/klippy/console.py
+++ b/klippy/console.py
@@ -53,7 +53,7 @@ class KeyboardReader:
         self.output(help_txt)
         self.output("="*20 + " attempting to connect " + "="*20)
         self.ser.connect()
-        msgparser = self.ser.msgparser
+        msgparser = self.ser.get_msgparser()
         self.output("Loaded %d commands (%s / %s)" % (
             len(msgparser.messages_by_id),
             msgparser.version, msgparser.build_versions))
@@ -72,8 +72,8 @@ class KeyboardReader:
         sys.stdout.flush()
     def handle_default(self, params):
         tdiff = params['#receive_time'] - self.start_time
-        self.output("%07.3f: %s" % (
-            tdiff, self.ser.msgparser.format_params(params)))
+        msg = self.ser.get_msgparser().format_params(params)
+        self.output("%07.3f: %s" % (tdiff, msg))
     def handle_output(self, params):
         tdiff = params['#receive_time'] - self.start_time
         self.output("%07.3f: %s: %s" % (tdiff, params['#name'], params['#msg']))
@@ -137,7 +137,7 @@ class KeyboardReader:
                               self.clocksync.stats(curtime)]))
     def command_LIST(self, parts):
         self.update_evals(self.reactor.monotonic())
-        mp = self.ser.msgparser
+        mp = self.ser.get_msgparser()
         out = "Available mcu commands:"
         out += "\n  ".join([""] + sorted([
             mp.messages_by_id[i].msgformat for i in mp.command_ids]))
diff --git a/klippy/mcu.py b/klippy/mcu.py
index ff8ed23b..cb07658f 100644
--- a/klippy/mcu.py
+++ b/klippy/mcu.py
@@ -544,7 +544,7 @@ class MCU:
         self._config_cmds.insert(0, "allocate_oids count=%d" % (
             self._oid_count,))
         # Resolve pin names
-        mcu_type = self._serial.msgparser.get_constant('MCU')
+        mcu_type = self._serial.get_msgparser().get_constant('MCU')
         ppins = self._printer.lookup_object('pins')
         reserved_pins = ppins.get_reserved_pins(self._name)
         pin_resolver = pins.PinResolver(mcu_type, reserved_pins)
@@ -616,7 +616,7 @@ class MCU:
                 self._check_restart("enable power")
             self._serial.connect()
             self._clocksync.connect(self._serial)
-        msgparser = self._serial.msgparser
+        msgparser = self._serial.get_msgparser()
         name = self._name
         log_info = [
             "Loaded MCU '%s' %d commands (%s / %s)" % (
@@ -689,16 +689,16 @@ class MCU:
     def try_lookup_command(self, msgformat):
         try:
             return self.lookup_command(msgformat)
-        except self._serial.msgparser.error as e:
+        except self._serial.get_msgparser().error as e:
             return None
     def lookup_command_id(self, msgformat):
-        return self._serial.msgparser.lookup_command(msgformat).msgid
+        return self._serial.get_msgparser().lookup_command(msgformat).msgid
     def get_enumerations(self):
-        return self._serial.msgparser.get_enumerations()
+        return self._serial.get_msgparser().get_enumerations()
     def get_constants(self):
-        return self._serial.msgparser.get_constants()
+        return self._serial.get_msgparser().get_constants()
     def get_constant_float(self, name):
-        return self._serial.msgparser.get_constant_float(name)
+        return self._serial.get_msgparser().get_constant_float(name)
     def print_time_to_clock(self, print_time):
         return self._clocksync.print_time_to_clock(print_time)
     def clock_to_print_time(self, clock):
diff --git a/klippy/serialhdl.py b/klippy/serialhdl.py
index e0548e37..82748b70 100644
--- a/klippy/serialhdl.py
+++ b/klippy/serialhdl.py
@@ -116,6 +116,8 @@ class SerialReader:
         self.ffi_lib.serialqueue_get_stats(
             self.serialqueue, self.stats_buf, len(self.stats_buf))
         return self.ffi_main.string(self.stats_buf)
+    def get_msgparser(self):
+        return self.msgparser
     # Serial response callbacks
     def register_response(self, callback, name, oid=None):
         with self.lock: