diff --git a/Aircraft/c172p/Instruments/ky196/KY196.nas b/Aircraft/c172p/Instruments/ky196/KY196.nas
index 6c26db202..1d82ac494 100644
--- a/Aircraft/c172p/Instruments/ky196/KY196.nas
+++ b/Aircraft/c172p/Instruments/ky196/KY196.nas
@@ -14,10 +14,10 @@ setlistener("/sim/signals/fdm-initialized", func {
     print("KY-196 Comm System ... OK");
     });
 
-setlistener("/instrumentation/ky-196/volume-adjust", func {
+setlistener("/instrumentation/ky-196/volume-adjust", func(n) {
     if(FDM_ON == 0){return;}
-    var setting = cmdarg().getValue();
-    cmdarg().setDoubleValue(0);
+    var setting = n.getValue();
+    n.setDoubleValue(0);
     comm_num = KY196.getNode("comm-num").getValue();
     var commNode = props.globals.getNode("instrumentation/comm[" ~ comm_num ~"]");
     var vol = commNode.getNode("volume").getValue() + setting;
diff --git a/Aircraft/c172p/Nasal/light.nas b/Aircraft/c172p/Nasal/light.nas
index e04475a50..60947e58d 100644
--- a/Aircraft/c172p/Nasal/light.nas
+++ b/Aircraft/c172p/Nasal/light.nas
@@ -6,9 +6,9 @@ sbc2 = aircraft.light.new( "/sim/model/lights/sbc2", [0.2, 0.3], "/sim/model/lig
 sbc2.interval = 0;
 sbc2.switch( 1 );
 
-setlistener( "/sim/model/lights/sbc2/state", func {
+setlistener( "/sim/model/lights/sbc2/state", func(n) {
   bsbc1 = sbc1.stateN.getValue();
-  bsbc2 = cmdarg().getBoolValue();
+  bsbc2 = n.getBoolValue();
   b = 0;
   if( bsbc1 and bsbc2 and getprop( "/controls/lighting/beacon") ) {
     b = 1;