diff --git a/src/middlewared/middlewared/plugins/system/product.py b/src/middlewared/middlewared/plugins/system/product.py
index 0517e656817ae..9ba96732026a6 100644
--- a/src/middlewared/middlewared/plugins/system/product.py
+++ b/src/middlewared/middlewared/plugins/system/product.py
@@ -24,7 +24,7 @@ class SystemService(Service):
 
     PRODUCT_TYPE = None
 
-    @accepts()
+    @accepts(roles=['READONLY_ADMIN'])
     @returns(Str('product_type'))
     async def product_type(self):
         """