diff --git a/BUILD.gn b/BUILD.gn
index 1bdb68681..2196be415 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -162,8 +162,9 @@ static_library("libyuv_internal") {
   # crbug.com/538243).
   if (!is_debug || is_nacl) {
     configs -= [ "//build/config/compiler:default_optimization" ]
+
     # Enable optimize for speed (-O2) over size (-Os).
-    #configs += [ "//build/config/compiler:optimize_max" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
   }
 
   # To enable AVX2 or other cpu optimization, pass flag here