diff --git a/openair2/ENB_APP/flexran_agent_task_manager.c b/openair2/ENB_APP/flexran_agent_task_manager.c
index 088ec618c7..4a0fee1f5b 100644
--- a/openair2/ENB_APP/flexran_agent_task_manager.c
+++ b/openair2/ENB_APP/flexran_agent_task_manager.c
@@ -77,6 +77,7 @@ flexran_agent_task_queue_t *flexran_agent_task_queue_init(mid_t mod_id, size_t c
   if (queue == NULL)
     goto error;
 
+  queue->mutex = NULL;
   /* If no comparator was given, use the default one */
   if (cmp == NULL)
     queue->cmp = _flexran_agent_task_queue_cmp;