diff -ur mock-0.4.autocache/src/mock-helper.c mock-0.4.bind/src/mock-helper.c
--- mock-0.4.autocache/src/mock-helper.c	2006-05-20 16:34:11.000000000 -0500
+++ mock-0.4.bind/src/mock-helper.c	2006-05-20 16:36:12.000000000 -0500
@@ -233,6 +233,11 @@
     else if (strncmp (rootsdir, argv[5], strlen (rootsdir)) != 0)
       error ("devpts: mount not allowed on %s", argv[5]);
   }
+  else if (strncmp ("--bind", argv[2], 6) == 0)
+  {
+    if (strncmp (rootsdir, argv[4], strlen (rootsdir)) != 0)
+      error ("bind: not allowed on %s", argv[4]);
+  }
   else
     error ("unallowed mount type");