From 692760720b197b46e8e4268bede8cad6f90399aa Mon Sep 17 00:00:00 2001
From: Manuel Mausz <manuel@mausz.at>
Date: Tue, 11 Jun 2019 15:28:27 +0200
Subject: Fix compile warnings...

---
 substdio.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'substdio.h')

diff --git a/substdio.h b/substdio.h
index c3f7f7d..bb9dac9 100644
--- a/substdio.h
+++ b/substdio.h
@@ -1,12 +1,14 @@
 #ifndef SUBSTDIO_H
 #define SUBSTDIO_H
 
+#include <unistd.h>
+
 typedef struct substdio {
   char *x;
   int p;
   int n;
   int fd;
-  int (*op)();
+  ssize_t (*op)();
 } substdio;
 
 #define SUBSTDIO_FDBUF(op,fd,buf,len) { (buf), 0, (len), (fd), (op) }
-- 
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