diff --git a/lib/start.js b/lib/start.js
index 31bb91969934..3cabf62f9592 100644
--- a/lib/start.js
+++ b/lib/start.js
@@ -40,6 +40,9 @@ const start = (passthroughArgs, buildConfig = config.defaultBuildConfig, options
     // This only has meaning with MacOS and official build.
     braveArgs.push('--disable-brave-update')
   }
+  if (options.enable_smart_tracking_protection) {
+    braveArgs.push('--enable-smart-tracking-protection')
+  }
   if (options.single_process) {
     braveArgs.push('--single-process')
   }