diff --git a/include/__config b/include/__config
index c018f6b3f..e1c5a67a9 100644
--- a/include/__config
+++ b/include/__config
@@ -623,8 +623,8 @@ template <unsigned> struct __static_assert_check {};
 // g++ and cl.exe have RTTI on by default and define a macro when it is.
 // g++ only defines the macro in 4.3.2 and onwards.
 #if !defined(_LIBCPP_NO_RTTI)
-#  if defined(__GNUG__) && (__GNUC__ >= 4 && \
-   (__GNUC_MINOR__ >= 3 || __GNUC_PATCHLEVEL__ >= 2)) && !defined(__GXX_RTTI)
+#  if defined(__GNUG__) && ((__GNUC__ >= 5) || (__GNUC__ == 4 && \
+   (__GNUC_MINOR__ >= 3 || __GNUC_PATCHLEVEL__ >= 2))) && !defined(__GXX_RTTI)
 #    define _LIBCPP_NO_RTTI
 #  elif (defined(_MSC_VER) && !defined(__clang__)) && !defined(_CPPRTTI)
 #    define _LIBCPP_NO_RTTI