diff --git a/drivers/net/e2100.c b/drivers/net/e2100.c
index d39e848..c62d9c6 100644
--- a/drivers/net/e2100.c
+++ b/drivers/net/e2100.c
@@ -463,7 +463,7 @@
 	release_region(dev->base_addr, E21_IO_EXTENT);
 }
 
-void
+void __exit
 cleanup_module(void)
 {
 	int this_dev;