diff --git a/Include/object.h b/Include/object.h
index f5ec7d4..372eada 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -142,7 +142,8 @@
 
 /* buffer interface */
 typedef struct bufferinfo {
-	void *buf;         
+	void *buf;   
+	PyObject *obj;        /* borrowed reference */
         Py_ssize_t len;
         Py_ssize_t itemsize;  /* This is Py_ssize_t so it can be 
                                  pointed to by strides in simple case.*/