diff --git a/shell/browser/api/electron_api_web_contents.cc b/shell/browser/api/electron_api_web_contents.cc
index 3460e5f005..372b19221d 100644
--- a/shell/browser/api/electron_api_web_contents.cc
+++ b/shell/browser/api/electron_api_web_contents.cc
@@ -644,7 +644,7 @@ std::string RegisterFileSystem(content::WebContents* web_contents,
   content::RenderViewHost* render_view_host = web_contents->GetRenderViewHost();
   int renderer_id = render_view_host->GetProcess()->GetDeprecatedID();
   content::ChildProcessId process_id = render_view_host->GetProcess()->GetID();
-  policy->GrantReadFileSystem(renderer_id, file_system.id());
+  policy->GrantReadFileSystem(process_id, file_system.id());
   policy->GrantWriteFileSystem(renderer_id, file_system.id());
   policy->GrantCreateFileForFileSystem(renderer_id, file_system.id());
   policy->GrantDeleteFromFileSystem(renderer_id, file_system.id());