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-rw-r--r--include/string.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/string.h b/include/string.h
index 8315203a4..5ffd97150 100644
--- a/include/string.h
+++ b/include/string.h
@@ -141,7 +141,8 @@ extern size_t strxfrm_l (char *__dest, const char *__src, size_t __n,
libc_hidden_proto(strxfrm_l)
#endif
-#if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+#if defined __USE_SVID || defined __USE_BSD || \
+ defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
/* Duplicate S, returning an identical malloc'd string. */
extern char *strdup (const char *__s)
__THROW __attribute_malloc__ __nonnull ((1));