--- a/sys/sys/eventhandler.h	2026-06-29 12:51:19.000000000 +0000
+++ b/sys/sys/eventhandler.h	2026-10-26 00:25:42.793042876 +0000
@@ -93,7 +93,7 @@
     eventhandler_register(Xeventhandler_list_ ## name, #name, func, arg, priority)
 
 #define EVENTHANDLER_FAST_DEREGISTER(name, tag) \
-    eventhandler_deregister(Xeventhandler_list ## name, tag)
+    eventhandler_deregister(Xeventhandler_list_ ## name, tag)
 
 
 /*