diff --git a/sched/clock/clock_adjtime.c b/sched/clock/clock_adjtime.c
index a87e0f1e92..0effc2e241 100644
--- a/sched/clock/clock_adjtime.c
+++ b/sched/clock/clock_adjtime.c
@@ -116,6 +116,7 @@ static int adjtime_start(long long adjust_usec)
     }
 
   flags = spin_lock_irqsave(&g_adjtime_lock);
+  sched_lock();
 
   /* Set new adjustment */
 
@@ -142,6 +143,7 @@ static int adjtime_start(long long adjust_usec)
     }
 
   spin_unlock_irqrestore(&g_adjtime_lock, flags);
+  sched_unlock();
 
   return ret;
 }
diff --git a/sched/misc/assert.c b/sched/misc/assert.c
index 516d94ea10..969fbf68fe 100644
--- a/sched/misc/assert.c
+++ b/sched/misc/assert.c
@@ -840,6 +840,7 @@ void _assert(FAR const char *filename, int linenum,
   if (os_ready)
     {
       flags = spin_lock_irqsave(&g_assert_lock);
+      sched_lock();
     }
 
 #if CONFIG_BOARD_RESET_ON_ASSERT < 2
@@ -913,5 +914,6 @@ void _assert(FAR const char *filename, int linenum,
   if (os_ready)
     {
       spin_unlock_irqrestore(&g_assert_lock, flags);
+      sched_unlock();
     }
 }
diff --git a/sched/wqueue/kwork_notifier.c b/sched/wqueue/kwork_notifier.c
index 6b274e44f2..813b46c0a5 100644
--- a/sched/wqueue/kwork_notifier.c
+++ b/sched/wqueue/kwork_notifier.c
@@ -31,6 +31,7 @@
 #include <stdbool.h>
 #include <unistd.h>
 #include <string.h>
+#include <sched.h>
 #include <assert.h>
 
 #include <nuttx/arch.h>
@@ -360,6 +361,7 @@ void work_notifier_signal(enum work_evtype_e evtype,
    */
 
   flags = spin_lock_irqsave(&g_notifier_lock);
+  sched_lock();
 
   /* Process the notification at the head of the pending list until the
    * pending list is empty
@@ -403,6 +405,7 @@ void work_notifier_signal(enum work_evtype_e evtype,
     }
 
   spin_unlock_irqrestore(&g_notifier_lock, flags);
+  sched_unlock();
 }
 
 #endif /* CONFIG_WQUEUE_NOTIFIER */
diff --git a/sched/wqueue/kwork_queue.c b/sched/wqueue/kwork_queue.c
index 63741b3f5d..1ced5c797e 100644
--- a/sched/wqueue/kwork_queue.c
+++ b/sched/wqueue/kwork_queue.c
@@ -69,6 +69,7 @@ static void work_timer_expiry(wdparm_t arg)
   FAR struct work_s *work = (FAR struct work_s *)arg;
 
   irqstate_t flags = spin_lock_irqsave(&work->wq->lock);
+  sched_lock();
 
   /* We have being canceled */
 
@@ -78,6 +79,7 @@ static void work_timer_expiry(wdparm_t arg)
     }
 
   spin_unlock_irqrestore(&work->wq->lock, flags);
+  sched_unlock();
 }
 
 static bool work_is_canceling(FAR struct kworker_s *kworkers, int nthreads,
@@ -182,8 +184,10 @@ int work_queue_wq(FAR struct kwork_wqueue_s *wqueue,
 
   if (!delay)
     {
+      sched_lock();
       queue_work(wqueue, work);
       spin_unlock_irqrestore(&wqueue->lock, flags);
+      sched_unlock();
     }
   else
     {
diff --git a/sched/wqueue/kwork_thread.c b/sched/wqueue/kwork_thread.c
index 84a51770cb..74e3b8b294 100644
--- a/sched/wqueue/kwork_thread.c
+++ b/sched/wqueue/kwork_thread.c
@@ -27,6 +27,7 @@
 #include <nuttx/config.h>
 
 #include <unistd.h>
+#include <sched.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
@@ -204,7 +205,9 @@ static int work_thread(int argc, FAR char *argv[])
           while (kworker->wait_count > 0)
             {
               kworker->wait_count--;
+              sched_lock();
               nxsem_post(&kworker->wait);
+              sched_unlock();
             }
         }