diff --git a/buildheader/db.h_4_6 b/buildheader/db.h_4_6
index 7d103dda944..f6daece7b5f 100644
--- a/buildheader/db.h_4_6
+++ b/buildheader/db.h_4_6
@@ -213,8 +213,9 @@ struct __toku_db_txn_active {
   char __toku_dummy2[200];  /* Padding at the end */ 
 };
 struct __toku_db_txn {
+  DB_ENV *mgrp /*In TokuDB, mgrp is a DB_ENV not a DB_TXNMGR*/; /* 32-bit offset=0 size=4, 64=bit offset=0 size=8 */
   struct __toku_db_txn_internal *i;
-  void* __toku_dummy0[19];
+  void* __toku_dummy0[18];
   char __toku_dummy1[8];
   void *api_internal; /* 32-bit offset=88 size=4, 64=bit offset=168 size=8 */
   void* __toku_dummy2[2];
@@ -235,8 +236,9 @@ struct __toku_db_txn_stat {
   char __toku_dummy5[8];  /* Padding at the end */ 
 };
 struct __toku_dbc {
+  DB *dbp; /* 32-bit offset=0 size=4, 64=bit offset=0 size=8 */
   struct __toku_dbc_internal *i;
-  void* __toku_dummy0[34];
+  void* __toku_dummy0[33];
   char __toku_dummy1[104];
   int (*c_close) (DBC *); /* 32-bit offset=244 size=4, 64=bit offset=384 size=8 */
   void* __toku_dummy2[1];
diff --git a/buildheader/sample_offsets_64_4_6.h b/buildheader/sample_offsets_64_4_6.h
index 1943836694e..95c7fd3d47e 100644
--- a/buildheader/sample_offsets_64_4_6.h
+++ b/buildheader/sample_offsets_64_4_6.h
@@ -75,6 +75,7 @@ struct fieldinfo db_txn_active_fields64[] = {
   {0, 232, 232} /* size of whole struct */
 };
 struct fieldinfo db_txn_fields64[] = {
+  {"DB_ENV *mgrp /*In TokuDB, mgrp is a DB_ENV not a DB_TXNMGR*/", 0, 8},
   {"void *api_internal", 168, 8},
   {"int (*abort) (DB_TXN *)", 192, 8},
   {"int (*commit) (DB_TXN*, u_int32_t)", 200, 8},
@@ -87,6 +88,7 @@ struct fieldinfo db_txn_stat_fields64[] = {
   {0, 88, 88} /* size of whole struct */
 };
 struct fieldinfo dbc_fields64[] = {
+  {"DB *dbp", 0, 8},
   {"int (*c_close) (DBC *)", 384, 8},
   {"int (*c_del) (DBC *, u_int32_t)", 400, 8},
   {"int (*c_get) (DBC *, DBT *, DBT *, u_int32_t)", 416, 8},