Index: uspace/srv/audio/hound/connection.h
===================================================================
--- uspace/srv/audio/hound/connection.h	(revision fa60cd6916b124f0460287cd7ff7f3f27ad2813c)
+++ uspace/srv/audio/hound/connection.h	(revision be7eccfe06a8b888ebc5cd4f23fb6368b014b9f7)
@@ -54,15 +54,15 @@
 static inline connection_t * connection_from_source_list(link_t *l)
 {
-	return list_get_instance(l, connection_t, source_link);
+	return l ? list_get_instance(l, connection_t, source_link) : NULL;
 }
 
 static inline connection_t * connection_from_sink_list(link_t *l)
 {
-	return list_get_instance(l, connection_t, sink_link);
+	return l ? list_get_instance(l, connection_t, sink_link) : NULL;
 }
 
 static inline connection_t * connection_from_hound_list(link_t *l)
 {
-	return list_get_instance(l, connection_t, hound_link);
+	return l ? list_get_instance(l, connection_t, hound_link) : NULL;
 }