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-rw-r--r--newlib/libc/include/wctype.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/newlib/libc/include/wctype.h b/newlib/libc/include/wctype.h
index c72c9decf..0e335ec8d 100644
--- a/newlib/libc/include/wctype.h
+++ b/newlib/libc/include/wctype.h
@@ -25,7 +25,9 @@ typedef int wctrans_t;
int _EXFUN(iswalpha, (wint_t));
int _EXFUN(iswalnum, (wint_t));
+#if __ISO_C_VISIBLE >= 1999
int _EXFUN(iswblank, (wint_t));
+#endif
int _EXFUN(iswcntrl, (wint_t));
int _EXFUN(iswctype, (wint_t, wctype_t));
int _EXFUN(iswdigit, (wint_t));