diff -ru work.old/vmmon-only/linux/driver.c work/vmmon-only/linux/driver.c
--- work.old/vmmon-only/linux/driver.c	2015-08-14 22:39:49.000000000 +0200
+++ work/vmmon-only/linux/driver.c	2015-09-14 22:11:06.807909249 +0200
@@ -387,9 +387,7 @@
 #ifdef VMX86_DEVEL
    unregister_chrdev(linuxState.major, linuxState.deviceName);
 #else
-   if (misc_deregister(&linuxState.misc)) {
-      Warning("Module %s: error unregistering\n", linuxState.deviceName);
-   }
+   misc_deregister(&linuxState.misc);
 #endif
 
    Log("Module %s: unloaded\n", linuxState.deviceName);