1 files changed, 7 insertions, 2 deletions

diff --git a/umount.c b/umount.c
index 061bb9b16..3bd86814e 100644
--- a/umount.c
+++ b/umount.c
@@ -73,8 +73,13 @@ umount_all(int useMtab)
             while ((m = getmntent (mountTable)) != 0) {
                 char *blockDevice = m->mnt_fsname;
 #if ! defined BB_MTAB
-                if (strcmp (blockDevice, "/dev/root") == 0)
-                    blockDevice = (getfsfile ("/"))->fs_spec;
+                if (strcmp (blockDevice, "/dev/root") == 0) {
+                    struct fstab* fstabItem;
+                    fstabItem = getfsfile ("/");
+                    if (fstabItem != NULL) {
+                        blockDevice = fstabItem->fs_spec;
+                    }
+                }
 #endif
                 /* Don't umount /proc when doing umount -a */
                 if (strcmp (blockDevice, "proc") == 0)