--- mkdosfs/mkdosfs.c
+++ mkdosfs/mkdosfs.c
@@ -592,11 +592,15 @@
   FILE *f;
   struct mntent *mnt;
 
-  if ((f = setmntent (MOUNTED, "r")) == NULL)
-    return;
+  if ((f = setmntent ("/proc/mounts", "r")) == NULL)
+    if ((f = setmntent (MOUNTED, "r")) == NULL)
+      return;
   while ((mnt = getmntent (f)) != NULL)
     if (strcmp (device_name, mnt->mnt_fsname) == 0)
-      die ("%s contains a mounted file system.");
+      if (strcmp ("subfs", mnt->mnt_type) != 0)
+        die ("%s contains a mounted file system.");
+      else
+	     printf("Device mounted using subfs, please do not access it while creating filesystem\n");
   endmntent (f);
 }