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-rw-r--r--posix/unistd.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/posix/unistd.h b/posix/unistd.h
index f8b84e3cb3..5ebcaf18ee 100644
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -1020,6 +1020,9 @@ extern int truncate64 (__const char *__file, __off64_t __length)
      __THROW __nonnull ((1)) __wur;
 # endif
 
+#endif /* Use BSD || X/Open Unix || POSIX 2008.  */
+
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
 
 /* Truncate the file FD is open on to LENGTH bytes.  */
 # ifndef __USE_FILE_OFFSET64