diff --git a/doc/README.LED_display b/doc/README.LED_display
index 521746e129..19977ea7e0 100644
--- a/doc/README.LED_display
+++ b/doc/README.LED_display
@@ -14,7 +14,6 @@ This function should control the state of the LED display. Argument is
 an ORed combination of the following values:
  DISPLAY_CLEAR	-- clear the display
  DISPLAY_HOME	-- set the position to the beginning of display
- DISPLAY_MARK	-- enable mark (decimal point), if implemented
 
 int display_putc(char c);
 
diff --git a/include/led-display.h b/include/led-display.h
index 41c3744345..eaa0f40640 100644
--- a/include/led-display.h
+++ b/include/led-display.h
@@ -29,7 +29,6 @@
 /* Display Commands */
 #define DISPLAY_CLEAR	0x1 /* Clear the display */
 #define DISPLAY_HOME	0x2 /* Set cursor at home position */
-#define DISPLAY_MARK	0x4 /* Enable the decimal point led, if implemented */
 
 void display_set(int cmd);
 int display_putc(char c);