diff --git a/artiq/coredevice/shuttler.py b/artiq/coredevice/shuttler.py
index 5c5be0d34..34c6afda7 100644
--- a/artiq/coredevice/shuttler.py
+++ b/artiq/coredevice/shuttler.py
@@ -224,8 +224,7 @@ class ADC:
                 volts[ch].set_waveform(
                     shuttler_volt_to_mu(samples[i]), 0, 0, 0)
                 trigger.trigger(1 << ch)
-                delay(1*us)
-                measurements[i] = self.read_ch(ch ^ 1)
+                measurements[i] = self.read_ch(ch)
 
             # Find the average output slope
             print(measurements)