diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
index 40e05d0..5db265e 100644
--- a/include/linux/cdrom.h
+++ b/include/linux/cdrom.h
@@ -995,7 +995,7 @@
 extern int cdrom_media_changed(struct cdrom_device_info *);
 
 extern int register_cdrom(struct cdrom_device_info *cdi);
-extern int unregister_cdrom(struct cdrom_device_info *cdi);
+extern void unregister_cdrom(struct cdrom_device_info *cdi);
 
 typedef struct {
     int data;