diff --git a/drivers/sensors/sensor.c b/drivers/sensors/sensor.c
index a1ce148cf3..1bcb977393 100644
--- a/drivers/sensors/sensor.c
+++ b/drivers/sensors/sensor.c
@@ -84,6 +84,7 @@ struct sensor_user_s
   unsigned long    generation; /* Last generation subscriber has seen */
   unsigned long    interval;   /* The interval for subscriber */
   unsigned long    latency;    /* The bactch latency for subscriber */
+  bool             readlast;   /* The flag of readlast */
 };
 
 /* This structure describes the state of the upper half driver */
@@ -95,7 +96,6 @@ struct sensor_upperhalf_s
   struct circbuf_s   buffer;             /* The circular buffer of sensor device */
   sem_t              exclsem;            /* Manages exclusive access to file operations */
   struct list_node   userlist;           /* List of users */
-  bool               readlast;           /* The flag of readlast */
 };
 
 /****************************************************************************
@@ -402,6 +402,7 @@ static int sensor_open(FAR struct file *filep)
   user->interval   = ULONG_MAX;
   user->latency    = ULONG_MAX;
   user->generation = upper->state.generation;
+  user->readlast   = true;
   nxsem_init(&user->buffersem, 0, 0);
   nxsem_set_protocol(&user->buffersem, SEM_PRIO_NONE);
   list_add_tail(&upper->userlist, &user->node);
@@ -532,7 +533,7 @@ static ssize_t sensor_read(FAR struct file *filep, FAR char *buffer,
        * it will return 0 when there isn't new data.
        */
 
-      if (upper->readlast)
+      if (user->readlast)
         {
           if (circbuf_is_empty(&upper->buffer))
             {
@@ -716,7 +717,9 @@ static int sensor_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
       case SNIOC_READLAST:
         {
-          upper->readlast = !!arg;
+          sensor_semtake(upper);
+          user->readlast = !!arg;
+          sensor_semgive(upper);
         }
         break;
 
@@ -985,7 +988,6 @@ int sensor_custom_register(FAR struct sensor_lowerhalf_s *lower,
   /* Initialize the upper-half data structure */
 
   list_initialize(&upper->userlist);
-  upper->readlast = true;
   upper->state.esize = esize;
   upper->state.min_interval = ULONG_MAX;
   upper->state.min_latency = ULONG_MAX;