diff --git a/db/executor.go b/db/executor.go
index 717fe23b..c0491543 100644
--- a/db/executor.go
+++ b/db/executor.go
@@ -50,6 +50,7 @@ func newExecutor(id, ns, db string) (e *executor) {
 	e.ns = ns
 	e.db = db
 
+	e.tx = nil
 	e.err = nil
 	e.buf = nil