diff --git a/cmd/stanza/init_common.go b/cmd/stanza/init_common.go
index fef4861cf..467395d37 100644
--- a/cmd/stanza/init_common.go
+++ b/cmd/stanza/init_common.go
@@ -26,6 +26,7 @@ import (
 	_ "github.com/observiq/stanza/operator/builtin/transformer/add"
 	_ "github.com/observiq/stanza/operator/builtin/transformer/copy"
 	_ "github.com/observiq/stanza/operator/builtin/transformer/filter"
+	_ "github.com/observiq/stanza/operator/builtin/transformer/flatten"
 	_ "github.com/observiq/stanza/operator/builtin/transformer/hostmetadata"
 	_ "github.com/observiq/stanza/operator/builtin/transformer/k8smetadata"
 	_ "github.com/observiq/stanza/operator/builtin/transformer/metadata"