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-rw-r--r--libcxx/include/support/solaris/wchar.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libcxx/include/support/solaris/wchar.h b/libcxx/include/support/solaris/wchar.h
index 0af4ea858eb..05a7241789d 100644
--- a/libcxx/include/support/solaris/wchar.h
+++ b/libcxx/include/support/solaris/wchar.h
@@ -16,6 +16,7 @@
#define wcswidth sun_wcswidth
#define wcwidth sun_wcwidth
#define wctype sun_wctype
+#define _WCHAR_T 1
#include_next "wchar.h"
#undef iswalpha
#undef iswupper
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