diff --git a/tools/cpp/osx_cc_configure.bzl b/tools/cpp/osx_cc_configure.bzl
index 9434c16..7202d49 100644
--- a/tools/cpp/osx_cc_configure.bzl
+++ b/tools/cpp/osx_cc_configure.bzl
@@ -108,6 +108,8 @@
             "env",
             "-i",
             "xcrun",
+            "--sdk",
+            "macosx",
             "clang",
             "-std=c++11",
             "-lc++",