diff --git a/modules/system/controllers/updates/form.theme_upload.yaml b/modules/system/controllers/updates/form.theme_upload.yaml
new file mode 100644
index 0000000000..d93b735ec4
--- /dev/null
+++ b/modules/system/controllers/updates/form.theme_upload.yaml
@@ -0,0 +1,6 @@
+fields:
+    uploaded_package:
+        type: fileupload
+        span: full
+        mode: file
+        fileTypes: zip