diff --git a/tools/v8_gypfiles/v8.gyp b/tools/v8_gypfiles/v8.gyp
index 9acad07d966a35..f1cdbe41718ba3 100644
--- a/tools/v8_gypfiles/v8.gyp
+++ b/tools/v8_gypfiles/v8.gyp
@@ -42,6 +42,9 @@
       }
     },
   },
+  'xcode_settings': {
+    'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',  # -fvisibility=hidden
+  },
   'targets': [
     {
       'target_name': 'v8_pch',