diff --git a/include/patty/ax25/aprs_is.h b/include/patty/ax25/aprs_is.h
index 1a0ff1a..dde9f7a 100644
--- a/include/patty/ax25/aprs_is.h
+++ b/include/patty/ax25/aprs_is.h
@@ -41,11 +41,13 @@ int patty_ax25_aprs_is_ready(patty_ax25_aprs_is *aprs, fd_set *fds);
 
 ssize_t patty_ax25_aprs_is_fill(patty_ax25_aprs_is *aprs);
 
-ssize_t patty_ax25_aprs_is_drain(patty_ax25_aprs_is *, void *buf, size_t len);
+ssize_t patty_ax25_aprs_is_drain(patty_ax25_aprs_is *aprs,
+                                 void *buf,
+                                 size_t len);
 
-int patty_ax25_aprs_is_pending(patty_ax25_aprs_is *);
+int patty_ax25_aprs_is_pending(patty_ax25_aprs_is *aprs);
 
-ssize_t patty_ax25_aprs_is_flush(patty_ax25_aprs_is *);
+ssize_t patty_ax25_aprs_is_flush(patty_ax25_aprs_is *aprs);
 
 ssize_t patty_ax25_aprs_is_send(patty_ax25_aprs_is *aprs,
                                 const void *buf,