diff --git a/tools/images/bromite-build/build_args.gni b/tools/images/bromite-build/build_args.gni
index 7953a737..49be50a7 100644
--- a/tools/images/bromite-build/build_args.gni
+++ b/tools/images/bromite-build/build_args.gni
@@ -53,6 +53,8 @@ if (target_os == "win") {
   enable_plugins = true
   enable_ppapi = false
 
+  chrome_pgo_phase = 2 # enable pgo
+
   is_cfi = false # disable it
   use_cfi_cast = false # disable it
 }