diff --git a/drivers/net/wd.c b/drivers/net/wd.c
index 41f1d67..7f38012 100644
--- a/drivers/net/wd.c
+++ b/drivers/net/wd.c
@@ -538,7 +538,7 @@
 	iounmap(ei_status.mem);
 }
 
-void
+void __exit
 cleanup_module(void)
 {
 	int this_dev;