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-rw-r--r--libio/stdio.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libio/stdio.h b/libio/stdio.h
index b43826e..7a18261 100644
--- a/libio/stdio.h
+++ b/libio/stdio.h
@@ -581,7 +581,7 @@ extern char *ctermid (char *__s) __THROW;
#endif /* Use POSIX. */
-#if defined __USE_XOPEN && !defined __USE_XOPEN2K
+#ifdef __USE_XOPEN
/* Return the name of the current user. */
extern char *cuserid (char *__s) __THROW;
#endif /* Use X/Open, but not issue 6. */