diff --git a/libcef/browser/content_browser_client.cc b/libcef/browser/content_browser_client.cc
index 57f011764..8b4c19f44 100644
--- a/libcef/browser/content_browser_client.cc
+++ b/libcef/browser/content_browser_client.cc
@@ -686,8 +686,9 @@ void CefContentBrowserClient::AppendExtraCommandLineSwitches(
       switches::kLocalesDirPath,
       switches::kLogFile,
       switches::kLogSeverity,
-      switches::kResourcesDirPath,
       switches::kProductVersion,
+      switches::kResourcesDirPath,
+      switches::kUserAgent,
     };
     command_line->CopySwitchesFrom(browser_cmd, kSwitchNames,
                                    arraysize(kSwitchNames));
diff --git a/libcef/common/content_client.cc b/libcef/common/content_client.cc
index f9bada753..d4558c701 100644
--- a/libcef/common/content_client.cc
+++ b/libcef/common/content_client.cc
@@ -114,6 +114,9 @@ std::string CefContentClient::GetUserAgent() const {
   std::string product_version;
 
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+  if (command_line.HasSwitch(switches::kUserAgent))
+    return command_line.GetSwitchValueASCII(switches::kUserAgent);
+
   if (command_line.HasSwitch(switches::kProductVersion)) {
     product_version =
         command_line.GetSwitchValueASCII(switches::kProductVersion);