diff -r c7e1f2616a9d -r f8b779c9794e master/master.h
--- a/master/master.h	Mon May 13 20:21:19 2013 +0200
+++ b/master/master.h	Tue May 21 13:18:24 2013 +0200
@@ -343,7 +343,8 @@
 #endif
 
 // datagram IO
-void ec_master_receive_datagrams(ec_master_t *, const uint8_t *, size_t);
+void ec_master_receive_datagrams(ec_master_t *, ec_device_t *,
+        const uint8_t *, size_t);
 void ec_master_queue_datagram(ec_master_t *, ec_datagram_t *);
 void ec_master_queue_datagram_ext(ec_master_t *, ec_datagram_t *);