diff --git a/txfactory.go b/txfactory.go
index 768c065c6..420c5adfb 100644
--- a/txfactory.go
+++ b/txfactory.go
@@ -45,7 +45,7 @@ const (
 // DefaultTxsrc is set here. pilosa/server/config.go references it
 // to set the default for pilosa server exeutable.
 // Can be overridden with env variable PILOSA_TXSRC for testing.
-const DefaultTxsrc = RBFTxn
+const DefaultTxsrc = RoaringTxn
 
 // DetectMemAccessPastTx true helps us catch places in api and executor
 // where mmapped memory is being accessed after the point in time