diff --git a/include/linux/ceph/decode.h b/include/linux/ceph/decode.h
index d8615dee5808..bcbd66c84890 100644
--- a/include/linux/ceph/decode.h
+++ b/include/linux/ceph/decode.h
@@ -151,7 +151,7 @@ static inline void ceph_encode_filepath(void **p, void *end,
 					u64 ino, const char *path)
 {
 	u32 len = path ? strlen(path) : 0;
-	BUG_ON(*p + sizeof(ino) + sizeof(len) + len > end);
+	BUG_ON(*p + 1 + sizeof(ino) + sizeof(len) + len > end);
 	ceph_encode_8(p, 1);
 	ceph_encode_64(p, ino);
 	ceph_encode_32(p, len);