1 files changed, 2 insertions, 1 deletions
diff --git a/awk.h b/awk.h
index afc18e2e..a1fe66b2 100644
--- a/awk.h
+++ b/awk.h
@@ -906,6 +906,7 @@ typedef struct iobuf {
 	 */
 	ssize_t (*read_func)();
 
+	bool valid;
 	int errcode;
 
 	int flag;
@@ -1532,7 +1533,7 @@ extern int os_devopen(const char *name, int flag);
 extern void os_close_on_exec(int fd, const char *name, const char *what, const char *dir);
 extern int os_isatty(int fd);
 extern int os_isdir(int fd);
-extern int os_isreadable(int fd);
+extern int os_isreadable(int fd, bool *isdir);
 extern int os_is_setuid(void);
 extern int os_setbinmode(int fd, int mode);
 extern void os_restore_mode(int fd);