diff --git a/src/encoding/block.cpp b/src/encoding/block.cpp
index 37b2e6f..3451ffd 100644
--- a/src/encoding/block.cpp
+++ b/src/encoding/block.cpp
@@ -70,7 +70,8 @@
 }
 
 Block::Block(const ConstBufferPtr &buffer,
-             const Buffer::const_iterator &begin, const Buffer::const_iterator &end)
+             const Buffer::const_iterator &begin, const Buffer::const_iterator &end,
+             bool verifyLength/* = true*/)
   : m_buffer(buffer)
   , m_begin(begin)
   , m_end(end)
@@ -80,10 +81,13 @@
   m_value_end   = m_end;
 
   m_type = Tlv::readType(m_value_begin, m_value_end);
-  uint64_t length = Tlv::readVarNumber(m_value_begin, m_value_end);
-  if (length != static_cast<uint64_t>(m_value_end - m_value_begin))
+  if (verifyLength)
     {
-      throw Tlv::Error("TLV length doesn't match buffer length");
+      uint64_t length = Tlv::readVarNumber(m_value_begin, m_value_end);
+      if (length != static_cast<uint64_t>(m_value_end - m_value_begin))
+        {
+          throw Tlv::Error("TLV length doesn't match buffer length");
+        }
     }
 }