diff --git a/models/namespace_update.go b/models/namespace_update.go
index b46cea33b..56a009935 100644
--- a/models/namespace_update.go
+++ b/models/namespace_update.go
@@ -14,6 +14,9 @@ func (n *Namespace) Update() (err error) {
 	}
 
 	// Check if the (new) owner exists
+	if n.OwnerID == 0 {
+		n.OwnerID = n.Owner.ID
+	}
 	if currentNamespace.OwnerID != n.OwnerID {
 		n.Owner, err = GetUserByID(n.OwnerID)
 		if err != nil {