diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index bb31672..52b0290 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -133,6 +133,7 @@ const char *dbg_snprintf_key(const struct ubifs_info *c,
                }
        } else
                len -= snprintf(p, len, "bad key format %d", c->key_fmt);
+       printk(KERN_ERR "len %d, p %s\n", len, p);
        ubifs_assert(len > 0);
        return p;
 }