diff --git a/klippy/extras/ads1x1x.py b/klippy/extras/ads1x1x.py
index 10cd01f9..1d72996f 100644
--- a/klippy/extras/ads1x1x.py
+++ b/klippy/extras/ads1x1x.py
@@ -321,6 +321,7 @@ class ADS1X1X_pin:
     def __init__(self, chip, config):
         self.mcu = chip.mcu
         self.chip = chip
+        self.config = config
 
         self.invalid_count = 0