diff --git a/blockstack/lib/nameset/namedb.py b/blockstack/lib/nameset/namedb.py
index 4542ae13c..883cecae3 100644
--- a/blockstack/lib/nameset/namedb.py
+++ b/blockstack/lib/nameset/namedb.py
@@ -39,9 +39,9 @@ from ..config import NAMESPACE_DEFAULT, MIN_OP_LENGTHS, OPCODES, MAX_NAMES_PER_S
     NAMESPACE_PREORDER_EXPIRE, NAMESPACE_REVEAL_EXPIRE, NAMESPACE_REVEAL, BLOCKSTORE_VERSION, \
     NAMESPACE_1_CHAR_COST, NAMESPACE_23_CHAR_COST, NAMESPACE_4567_CHAR_COST, NAMESPACE_8UP_CHAR_COST, NAME_COST_UNIT, \
     TESTSET_NAMESPACE_1_CHAR_COST, TESTSET_NAMESPACE_23_CHAR_COST, TESTSET_NAMESPACE_4567_CHAR_COST, TESTSET_NAMESPACE_8UP_CHAR_COST, NAME_COST_UNIT, \
-    NAME_IMPORT_KEYRING_SIZE, GENESIS_SNAPSHOT, GENESIS_SNAPSHOT_TESTSET, default_blockstack_opts, NAMESPACE_READY
+    NAME_IMPORT_KEYRING_SIZE, GENESIS_SNAPSHOT, GENESIS_SNAPSHOT_TESTSET, default_blockstack_opts, NAMESPACE_READY, NAME_OPCODES
 
-from ..operations import build_namespace_reveal
+from ..operations import build_namespace_reveal, SERIALIZE_FIELDS
 from ..hashing import *
 from ..b40 import is_b40
 
@@ -81,7 +81,7 @@ class BlockstackDB( virtualchain.StateEngine ):
           initial_snapshots = GENESIS_SNAPSHOT
 
 
-      super( BlockstackDB, self ).__init__( virtualchain_hooks.get_magic_bytes(), OPCODES, impl=virtualchain_hooks, initial_snapshots=initial_snapshots, state=self )
+      super( BlockstackDB, self ).__init__( virtualchain_hooks.get_magic_bytes(), OPCODES, BlockstackDB.make_opfields(), impl=virtualchain_hooks, initial_snapshots=initial_snapshots, state=self )
 
       self.announce_ids = blockstack_opts['announcers'].split(",")
 
@@ -231,6 +231,20 @@ class BlockstackDB( virtualchain.StateEngine ):
       self.prescanned = False
 
 
+   @classmethod 
+   def make_opfields( cls ):
+       """
+       Calculate the virtulachain-required opfields dict.
+       """
+       # construct fields 
+       opfields = {}
+       for opname in SERIALIZE_FIELDS.keys():
+           opcode = NAME_OPCODES[opname]
+           opfields[opcode] = SERIALIZE_FIELDS[opname]
+
+       return opfields
+
+
    def save_db(self, filename):
       """
       Cache the set of blockstack operations to disk,