Index: src/events.c
===================================================================
--- src/events.c	(revision 12274)
+++ src/events.c	(working copy)
@@ -182,8 +182,6 @@
       _al_mutex_lock(&queue->mutex);
       discard_events_of_source(queue, source);
       _al_mutex_unlock(&queue->mutex);
-
-      _al_mutex_destroy(&source->mutex);
    }
 }