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-rw-r--r--libcxx/include/cwctype3
1 files changed, 2 insertions, 1 deletions
diff --git a/libcxx/include/cwctype b/libcxx/include/cwctype
index b3ef1ae905ad..429b00c2446d 100644
--- a/libcxx/include/cwctype
+++ b/libcxx/include/cwctype
@@ -49,12 +49,13 @@ wctrans_t wctrans(const char* property);
*/
+#include <__assert> // all public C++ headers provide the assertion handler
#include <__config>
#include <cctype>
#include <wctype.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD