1 files changed, 3 insertions, 2 deletions
diff --git a/src/mongo/db/index_builder.cpp b/src/mongo/db/index_builder.cpp
index 6014608300c..1e97c3da193 100644
--- a/src/mongo/db/index_builder.cpp
+++ b/src/mongo/db/index_builder.cpp
@@ -55,6 +55,8 @@ namespace mongo {
     void IndexBuilder::run() {
         LOG(2) << "IndexBuilder building index " << _index;
 
+        OperationContextImpl txn;
+
         Client::initThread(name().c_str());
         Lock::ParallelBatchWriterMode::iAmABatchParticipant();
 
@@ -62,8 +64,7 @@ namespace mongo {
 
         cc().curop()->reset(HostAndPort(), dbInsert);
         NamespaceString ns(_index["ns"].String());
-        Client::WriteContext ctx(ns.getSystemIndexesCollection());
-        OperationContextImpl txn;
+        Client::WriteContext ctx(&txn, ns.getSystemIndexesCollection());
 
         Database* db = dbHolder().get(ns.db().toString(), storageGlobalParams.dbpath);