diff --git a/shell/browser/browser_win.cc b/shell/browser/browser_win.cc
index 6cfc75f4a44ba..56a62ac32548f 100644
--- a/shell/browser/browser_win.cc
+++ b/shell/browser/browser_win.cc
@@ -67,7 +67,7 @@ bool GetProtocolLaunchPath(gin::Arguments* args, std::wstring* exe) {
   std::vector<std::wstring> launch_args;
   if (args->GetNext(&launch_args) && !launch_args.empty())
     *exe = base::StringPrintf(L"\"%ls\" \"%ls\" \"%%1\"", exe->c_str(),
-                              base::JoinString(launch_args, L" ").c_str());
+                              base::JoinString(launch_args, L"\"  \"").c_str());
   else
     *exe = base::StringPrintf(L"\"%ls\" \"%%1\"", exe->c_str());
   return true;