diff --git a/tcl/drivers/dil12.tcl b/tcl/drivers/dil12.tcl
index 4aa078e..44e5522 100644
--- a/tcl/drivers/dil12.tcl
+++ b/tcl/drivers/dil12.tcl
@@ -62,7 +62,7 @@ proc stdConfig::dil12 args {
     pollperiod 5 5
 
     node heaterrange -text wr
-    prop enum 2uW=1,20uW=2,200uW=3,2mW=4,20mW=5
+    prop enum off=0,2uW=1,20uW=2,200uW=3,2mW=4,20mW=5
     prop check dil12::check_heaterrange
     prop write stdSct::complete
     prop read dil12::get_heater