1 files changed, 3 insertions, 0 deletions
diff --git a/src/rt/sync/lock_free_queue.h b/src/rt/sync/lock_free_queue.h
index 1f09ec52..c1a309b8 100644
--- a/src/rt/sync/lock_free_queue.h
+++ b/src/rt/sync/lock_free_queue.h
@@ -1,6 +1,8 @@
 #ifndef LOCK_FREE_QUEUE_H
 #define LOCK_FREE_QUEUE_H
 
+#include "spin_lock.h"
+
 class lock_free_queue_node {
 public:
     lock_free_queue_node *next;
@@ -8,6 +10,7 @@ public:
 };
 
 class lock_free_queue : lock_free_queue_node {
+    spin_lock lock;
     lock_free_queue_node *_tail;
 public:
     lock_free_queue();