diff --git a/ttynvt.c b/ttynvt.c
index f677569..feeb7ec 100644
--- a/ttynvt.c
+++ b/ttynvt.c
@@ -473,7 +473,7 @@ ttynvt_read(fuse_req_t req, size_t size, off_t off,
             struct fuse_file_info *info)
 {
     ttynvt_t       *tty = (ttynvt_t *) (uintptr_t) info->fh;
-    ssize_t         res;
+    int             res;
 
     if (tty->error)
     {
@@ -503,7 +503,7 @@ ttynvt_read(fuse_req_t req, size_t size, off_t off,
         return;
     }
 
-    DBG2("read (slave): size:%ld, thread:%lu\n", res, pthread_self());
+    DBG2("read (slave): size:%d, thread:%lu\n", res, pthread_self());
 
     fuse_reply_buf(req, tty->tmp_buf, res);
 }
@@ -537,7 +537,7 @@ ttynvt_write(fuse_req_t req, const char *data, size_t size, off_t off,
         return;
     }
 
-    DBG2("write (slave): size:%ld, thread:%lu\n", size, pthread_self());
+    DBG2("write (slave): size:%d, thread:%lu\n", (int)size, pthread_self());
 
     fuse_reply_write(req, res);
 }