diff --git a/api/v1alpha2/kubeadmbootstrapconfig_types.go b/api/v1alpha2/kubeadmbootstrapconfig_types.go
index 98e9870..e7ea03d 100644
--- a/api/v1alpha2/kubeadmbootstrapconfig_types.go
+++ b/api/v1alpha2/kubeadmbootstrapconfig_types.go
@@ -168,7 +168,7 @@ type User struct {
 
 	// Passwd specifies a hashed password for the user
 	// +optional
-	Passwd *string `json:"passwd"`
+	Passwd *string `json:"passwd,omitempty"`
 
 	// PrimaryGroup specifies the primary group for the user
 	// +optional