diff --git a/include/__config b/include/__config
index 554109727..73e653c19 100644
--- a/include/__config
+++ b/include/__config
@@ -744,7 +744,7 @@ extern "C" void __sanitizer_annotate_contiguous_container(
 // 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__ >= 5) || (__GNUC__ == 4 && \
+#  if defined(__GNUC__) && ((__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)