diff --git a/libraries/chain/protocol/transaction.cpp b/libraries/chain/protocol/transaction.cpp
index 97c7b1c2..e9a16be3 100644
--- a/libraries/chain/protocol/transaction.cpp
+++ b/libraries/chain/protocol/transaction.cpp
@@ -71,7 +71,6 @@ void transaction::set_expiration( fc::time_point_sec expiration_time )
 void transaction::set_reference_block( const block_id_type& reference_block )
 {
    ref_block_num = fc::endian_reverse_u32(reference_block._hash[0]);
-   if( ref_block_num == 0 ) ref_block_prefix = 0;
    ref_block_prefix = reference_block._hash[1];
 }