Index: uspace/srv/audio/hound/main.c
===================================================================
--- uspace/srv/audio/hound/main.c	(revision 984a9ba2fa05c490a7066737655ed19130c714e8)
+++ uspace/srv/audio/hound/main.c	(revision e89a06a6551f1dacee7bb5fa05a9eaa8901612d6)
@@ -62,5 +62,5 @@
 }
 
-static void scan_for_devices(void)
+static void scan_for_devices(void *arg)
 {
 	hound_server_devices_iterate(device_callback);
@@ -94,5 +94,5 @@
 	}
 
-	ret = hound_server_set_device_change_callback(scan_for_devices);
+	ret = hound_server_set_device_change_callback(scan_for_devices, NULL);
 	if (ret != EOK) {
 		log_fatal("Failed to register for device changes: %s",
@@ -103,5 +103,5 @@
 	log_info("Running with service id %" PRIun, id);
 
-	scan_for_devices();
+	scan_for_devices(NULL);
 	task_retval(0);
 	async_manager();