diff --git a/modules/api/pkg/resource/deployment/deploy.go b/modules/api/pkg/resource/deployment/deploy.go
index 03294a7d278e..90fb0a6a6ad3 100644
--- a/modules/api/pkg/resource/deployment/deploy.go
+++ b/modules/api/pkg/resource/deployment/deploy.go
@@ -357,6 +357,10 @@ func DeployAppFromFile(cfg *rest.Config, spec *AppDeploymentFromFileSpec) (bool,
 			namespace = data.GetNamespace()
 		}
 
+		if namespace == "" {
+			namespace = "default"
+		}
+
 		if resource.Namespaced {
 			_, err = dynamicClient.Resource(groupVersionResource).Namespace(namespace).Create(context.TODO(), data, metaV1.CreateOptions{})
 		} else {