diff --git a/chromium/base/strings/utf_string_conversions.cc b/chromium/base/strings/utf_string_conversions.cc
index 12ed1f3e0..004ac6855 100644
--- a/chromium/base/strings/utf_string_conversions.cc
+++ b/chromium/base/strings/utf_string_conversions.cc
@@ -15,7 +15,7 @@
 #include "base/third_party/icu/icu_utf.h"
 #include "build/build_config.h"
 
-#if defined(OS_MAC)
+#if defined(OS_MAC) && __MAC_OS_X_VERSION_MAX_ALLOWED < 120300
 namespace std {
 inline namespace __1 {
 template class basic_string<base::char16, base::string16_internals::string16_char_traits>;