diff --git a/include/linux/i2c-algo-pcf.h b/include/linux/i2c-algo-pcf.h
index 5de8a31..0f91a95 100644
--- a/include/linux/i2c-algo-pcf.h
+++ b/include/linux/i2c-algo-pcf.h
@@ -33,6 +33,9 @@
 	int  (*getclock) (void *data);
 	void (*waitforpin) (void *data);
 
+	void (*xfer_begin) (void *data);
+	void (*xfer_end) (void *data);
+
 	/* Multi-master lost arbitration back-off delay (msecs)
 	 * This should be set by the bus adapter or knowledgable client
 	 * if bus is multi-mastered, else zero