diff --git a/buffer/buffer_feed.c b/buffer/buffer_feed.c
index 0dbcea0..8e35aba 100644
--- a/buffer/buffer_feed.c
+++ b/buffer/buffer_feed.c
@@ -5,7 +5,7 @@ extern int buffer_stubborn_read(int (*op)(),int fd,const char* buf, unsigned int
 int buffer_feed(buffer* b) {
   if (b->p==b->n) {
     int w;
-    if ((w=buffer_stubborn_read(b->op,b->fd,b->x,b->n))<0)
+    if ((w=buffer_stubborn_read(b->op,b->fd,b->x,b->a))<0)
       return -1;
     b->n=w;
     b->p=0;