diff --git a/msvc-deps/protobuf/libprotobuf/config.h b/msvc-deps/protobuf/libprotobuf/config.h
index 2c64450a18a84bd1c3dbc9933761eb204f9ab310..f6e9928bd0b91d22603c13c526459bfb5425af41 100644
--- a/msvc-deps/protobuf/libprotobuf/config.h
+++ b/msvc-deps/protobuf/libprotobuf/config.h
@@ -10,7 +10,7 @@
 //   http://blogs.msdn.com/vcblog/archive/2009/05/25/stl-breaking-changes-in-visual-studio-2010-beta-1.aspx
 // TODO(kenton):  Use unordered_map instead, which is available in MSVC 2010.
 #if _MSC_VER < 1310 || _MSC_VER >= 1600
-#define HASH_NAMESPACE std
+#define HASH_NAMESPACE ext
 #else
 #define HASH_NAMESPACE stdext
 #endif