diff --git a/tcl/coil.stick b/tcl/coil.stick
index 2e4a180..1157602 100644
--- a/tcl/coil.stick
+++ b/tcl/coil.stick
@@ -1,6 +1,6 @@
 stickDesc = coil reading
 
-stick_sensors coil undefined
+stick_sensors coil coil
 
 catch {
   eval "[hgetpropval /lnv switchgraph] 1"