diff --git a/klippy/extras/query_adc.py b/klippy/extras/query_adc.py
index eb065396..2102aaf8 100644
--- a/klippy/extras/query_adc.py
+++ b/klippy/extras/query_adc.py
@@ -14,23 +14,22 @@ class QueryADC:
     def register_adc(self, name, mcu_adc):
         self.adc[name] = mcu_adc
     cmd_QUERY_ADC_help = "Report the last value of an analog pin"
-    def cmd_QUERY_ADC(self, params):
-        gcode = self.printer.lookup_object('gcode')
-        name = gcode.get_str('NAME', params, None)
+    def cmd_QUERY_ADC(self, gcmd):
+        name = gcmd.get('NAME', None)
         if name not in self.adc:
             objs = ['"%s"' % (n,) for n in sorted(self.adc.keys())]
             msg = "Available ADC objects: %s" % (', '.join(objs),)
-            gcode.respond_info(msg)
+            gcmd.respond_info(msg)
             return
         value, timestamp = self.adc[name].get_last_value()
         msg = 'ADC object "%s" has value %.6f (timestamp %.3f)' % (
             name, value, timestamp)
-        pullup = gcode.get_float('PULLUP', params, None, above=0.)
+        pullup = gcmd.get_float('PULLUP', None, above=0.)
         if pullup is not None:
             v = max(.00001, min(.99999, value))
             r = pullup * v / (1.0 - v)
             msg += "\n resistance %.3f (with %.0f pullup)" % (r, pullup)
-        gcode.respond_info(msg)
+        gcmd.respond_info(msg)
 
 def load_config(config):
     return QueryADC(config)