diff --git a/README.md b/README.md
index 26ccc3a966..7a39c7e536 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,7 @@ Now that we have configured an auto build, we are able to provide quite a few HE
 - ME = Mosquito E3D mount
 - Melzi Host option disables local SD card to allow more features and buffer for Octoprint control
 - NF = Noise filtering for machines with cable extensions - reduces homing accuracy!
+- LR = Lerdge Filament Runout Sensor
 
 ## Primary notes for DW6
 - Power Loss Recovery is functional again