diff --git a/sched/wqueue/wqueue.h b/sched/wqueue/wqueue.h
index 518e8a38fb..7b4fee28e1 100644
--- a/sched/wqueue/wqueue.h
+++ b/sched/wqueue/wqueue.h
@@ -76,7 +76,7 @@ struct kworker_s
   volatile bool     busy;   /* True: Worker is not available */
 };
 
-/* This structure defines the state of one high-priority work queue */
+/* This structure defines the state of one kernel-mode work queue */
 
 struct kwork_wqueue_s
 {
@@ -85,22 +85,24 @@ struct kwork_wqueue_s
   struct kworker_s  worker[1]; /* Describes a worker thread */
 };
 
-
 /* This structure defines the state of one high-priority work queue.  This
  * structure must be cast-compatible with kwork_wqueue_s.
  */
 
+#ifdef CONFIG_SCHED_HPWORK
 struct hp_wqueue_s
 {
   uint32_t          delay;     /* Delay between polling cycles (ticks) */
   struct dq_queue_s q;         /* The queue of pending work */
   struct kworker_s  worker[1]; /* Describes the single high priority worker */
 };
+#endif
 
 /* This structure defines the state of one high-priority work queue.  This
  * structure must be cast compatible with kwork_wqueue_s
  */
 
+#ifdef CONFIG_SCHED_LPWORK
 struct lp_wqueue_s
 {
   uint32_t          delay;  /* Delay between polling cycles (ticks) */
@@ -110,6 +112,7 @@ struct lp_wqueue_s
 
   struct kworker_s  worker[CONFIG_SCHED_LPNTHREADS];
 };
+#endif
 
 /****************************************************************************
  * Public Data