diff --git a/include/queue.h b/include/queue.h
index 3b985f01..fd1d759f 100644
--- a/include/queue.h
+++ b/include/queue.h
@@ -81,6 +81,7 @@ static inline int queue_reinit (struct queue *queue)
 }
 
 static inline void queue_free (struct queue *queue) {
+	pthread_mutex_destroy (&queue->mutex);
 	free (queue->items);
 }