diff --git a/hwdb.d/60-keyboard.hwdb b/hwdb.d/60-keyboard.hwdb
index 1f6a8f0533..1474a860b3 100644
--- a/hwdb.d/60-keyboard.hwdb
+++ b/hwdb.d/60-keyboard.hwdb
@@ -973,16 +973,16 @@ evdev:input:b0003v046Dp00FE*
  KEYBOARD_KEY_c1018=media           # Media button
 
 # MX5000 keyboard (HID proxy mode and bluetooth matches)
-# The 4 buttons below the LCD send codes 0xc100c - 0xc100f. They only send
-# these codes when the LCD is displaying text send to it. These codes are
-# directly consumed by recent versions of lcdproc when it is driving the LCD,
-# so these codes should not be mapped
 evdev:input:b0003v046DpB305*
 evdev:input:b0005v046DpB305*
  KEYBOARD_KEY_c0230=zoomreset	# HUT says fullscreen, kbd says 100%
  KEYBOARD_KEY_c1004=send	# Send and receive / sync button
  KEYBOARD_KEY_c1006=coffee	# Status (online/away) button
  KEYBOARD_KEY_c1007=camera	# Webcam button
+ KEYBOARD_KEY_c100c=kbd_lcd_menu1 # 1st button below the builtin LCD
+ KEYBOARD_KEY_c100d=kbd_lcd_menu4 # 4th button below the builtin LCD
+ KEYBOARD_KEY_c100e=kbd_lcd_menu2 # 2nd button below the builtin LCD
+ KEYBOARD_KEY_c100f=kbd_lcd_menu3 # 3th button below the builtin LCD
  KEYBOARD_KEY_c1038=prog1	# Smartkey A → XF86Launch1
  KEYBOARD_KEY_c1039=prog2	# Smartkey B → XF86Launch2
  KEYBOARD_KEY_c103a=prog3	# Smartkey C → XF86Launch3
diff --git a/hwdb.d/parse_hwdb.py b/hwdb.d/parse_hwdb.py
index 9a933b82b2..b5395b11fe 100755
--- a/hwdb.d/parse_hwdb.py
+++ b/hwdb.d/parse_hwdb.py
@@ -196,10 +196,11 @@ def check_one_mount_matrix(prop, value):
 def check_one_keycode(prop, value):
     if value != '!' and ecodes is not None:
         key = 'KEY_' + value.upper()
-        if key not in ecodes:
-            key = value.upper()
-            if key not in ecodes:
-                error('Keycode {} unknown', key)
+        if not (key in ecodes or
+                value.upper() in ecodes or
+                 # new keys added in kernel 5.5
+                'KBD_LCD_MENU' in key):
+            error('Keycode {} unknown', key)
 
 def check_properties(groups):
     grammar = property_grammar()