diff -Naur i8kutils/i8kmon new/i8kmon
--- i8kutils/i8kmon	2015-05-21 11:33:21.596018503 +0200
+++ new/i8kmon	2015-05-21 11:35:11.958867344 +0200
@@ -430,6 +430,7 @@
 
 proc toggle_fan {fan {speed {}}} {
     global status
+    global config
 
     if {$speed != {}} {
 	set status($fan) $speed