Index: user/drbdsetup.c
===================================================================
--- user/drbdsetup.c	(revision 2659)
+++ user/drbdsetup.c	(working copy)
@@ -1220,6 +1220,9 @@
   struct stat sb;
   static char dev_name[50];
 
+  if(major==0 && minor==0)
+    return NULL;
+
   device_dir=opendir(dir);
 
   if(!device_dir) goto err_out;