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-rw-r--r--include/wctype.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/wctype.h b/include/wctype.h
index 3ac24f13..3da12195 100644
--- a/include/wctype.h
+++ b/include/wctype.h
@@ -43,8 +43,10 @@ wint_t towupper(wint_t);
wctrans_t wctrans(const char *);
wctype_t wctype(const char *);
+#ifndef __cplusplus
#undef iswdigit
#define iswdigit(a) (((unsigned)(a)-L'0') < 10)
+#endif
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)