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-rw-r--r--include/ctype.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/ctype.h b/include/ctype.h
index c3f80f3..f0ca797 100644
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -78,6 +78,10 @@ int isphonogram(int);
int isrune(int);
int isspecial(int);
#endif
+
+#if __POSIX_VISIBLE >= 200809
+#include <xlocale/_ctype.h>
+#endif
__END_DECLS
#ifndef __cplusplus
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