diff --git a/drivers/net/hp.c b/drivers/net/hp.c
index 2947097..635b13c 100644
--- a/drivers/net/hp.c
+++ b/drivers/net/hp.c
@@ -444,7 +444,7 @@
 	release_region(dev->base_addr - NIC_OFFSET, HP_IO_EXTENT);
 }
 
-void
+void __exit
 cleanup_module(void)
 {
 	int this_dev;