diff --git a/audio/audio.c b/audio/audio.c
index 763789c4d12..f09fe631f0b 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -716,7 +716,7 @@ static inline void audio_dequeuebuffer(FAR struct audio_upperhalf_s *upper,
       msg.session = session;
 #endif
       apb->flags |= AUDIO_APB_DEQUEUED;
-      mq_send(upper->usermq, &msg, sizeof(msg),
+      mq_send(upper->usermq, (FAR const char *)&msg, sizeof(msg),
               CONFIG_AUDIO_BUFFER_DEQUEUE_PRIO);
     }
 }
@@ -754,7 +754,7 @@ static inline void audio_complete(FAR struct audio_upperhalf_s *upper,
 #ifdef CONFIG_AUDIO_MULTI_SESSION
       msg.session = session;
 #endif
-      mq_send(upper->usermq, &msg, sizeof(msg),
+      mq_send(upper->usermq, (FAR const char *)&msg, sizeof(msg),
               CONFIG_AUDIO_BUFFER_DEQUEUE_PRIO);
     }
 }
diff --git a/drivers/audio/audio_null.c b/drivers/audio/audio_null.c
index 446682486db..3d045999616 100644
--- a/drivers/audio/audio_null.c
+++ b/drivers/audio/audio_null.c
@@ -437,7 +437,7 @@ static void *null_workerthread(pthread_addr_t pvarg)
     {
       /* Wait for messages from our message queue */
 
-      msglen = mq_receive(priv->mq, &msg, sizeof(msg), &prio);
+      msglen = mq_receive(priv->mq, (FAR char *)&msg, sizeof(msg), &prio);
 
       /* Handle the case when we return with no message */
 
@@ -589,7 +589,8 @@ static int null_stop(FAR struct audio_lowerhalf_s *dev)
 
   term_msg.msgId = AUDIO_MSG_STOP;
   term_msg.u.data = 0;
-  mq_send(priv->mq, &term_msg, sizeof(term_msg), CONFIG_AUDIO_NULL_MSG_PRIO);
+  mq_send(priv->mq, (FAR const char *)&term_msg, sizeof(term_msg),
+          CONFIG_AUDIO_NULL_MSG_PRIO);
 
   /* Join the worker thread */
 
diff --git a/drivers/audio/vs1053.c b/drivers/audio/vs1053.c
index b1780918c51..1d9b708e0df 100644
--- a/drivers/audio/vs1053.c
+++ b/drivers/audio/vs1053.c
@@ -1239,7 +1239,8 @@ static int vs1053_dreq_isr(int irq, FAR void *context)
   if (dev->running)
     {
       msg.msgId = AUDIO_MSG_DATA_REQUEST;
-      mq_send(dev->mq, &msg, sizeof(msg), CONFIG_VS1053_MSG_PRIO);
+      mq_send(dev->mq, (FAR const char *)&msg, sizeof(msg),
+              CONFIG_VS1053_MSG_PRIO);
     }
   else
     {
@@ -1303,7 +1304,7 @@ static void *vs1053_workerthread(pthread_addr_t pvarg)
 
       /* Wait for messages from our message queue */
 
-      size = mq_receive(dev->mq, &msg, sizeof(msg), &prio);
+      size = mq_receive(dev->mq, (FAR char *)&msg, sizeof(msg), &prio);
 
       /* Handle the case when we return with no message */
 
@@ -1530,7 +1531,8 @@ static int vs1053_stop(FAR struct audio_lowerhalf_s *lower)
 
   term_msg.msgId = AUDIO_MSG_STOP;
   term_msg.u.data = 0;
-  mq_send(dev->mq, &term_msg, sizeof(term_msg), CONFIG_VS1053_MSG_PRIO);
+  mq_send(dev->mq, (FAR const char *)&term_msg, sizeof(term_msg),
+          CONFIG_VS1053_MSG_PRIO);
 
   /* Join the worker thread */
 
@@ -1643,7 +1645,8 @@ static int vs1053_enqueuebuffer(FAR struct audio_lowerhalf_s *lower,
         {
           term_msg.msgId = AUDIO_MSG_ENQUEUE;
           term_msg.u.data = 0;
-          mq_send(dev->mq, &term_msg, sizeof(term_msg), CONFIG_VS1053_MSG_PRIO);
+          mq_send(dev->mq, (FAR const char *)&term_msg, sizeof(term_msg),
+                  CONFIG_VS1053_MSG_PRIO);
         }
     }
 
diff --git a/drivers/audio/wm8904.c b/drivers/audio/wm8904.c
index f2545e717c6..c90c834f653 100644
--- a/drivers/audio/wm8904.c
+++ b/drivers/audio/wm8904.c
@@ -1336,7 +1336,8 @@ static void  wm8904_senddone(FAR struct i2s_dev_s *i2s,
    */
 
   msg.msgId = AUDIO_MSG_COMPLETE;
-  ret = mq_send(priv->mq, &msg, sizeof(msg), CONFIG_WM8904_MSG_PRIO);
+  ret = mq_send(priv->mq, (FAR const char *)&msg, sizeof(msg),
+                CONFIG_WM8904_MSG_PRIO);
   if (ret < 0)
     {
       audlldbg("ERROR: mq_send failed: %d\n", errno);
@@ -1597,7 +1598,8 @@ static int wm8904_stop(FAR struct audio_lowerhalf_s *dev)
 
   term_msg.msgId = AUDIO_MSG_STOP;
   term_msg.u.data = 0;
-  mq_send(priv->mq, &term_msg, sizeof(term_msg), CONFIG_WM8904_MSG_PRIO);
+  mq_send(priv->mq, (FAR const char *)&term_msg, sizeof(term_msg),
+          CONFIG_WM8904_MSG_PRIO);
 
   /* Join the worker thread */
 
@@ -1712,7 +1714,8 @@ static int wm8904_enqueuebuffer(FAR struct audio_lowerhalf_s *dev,
       term_msg.msgId  = AUDIO_MSG_ENQUEUE;
       term_msg.u.data = 0;
 
-      ret = mq_send(priv->mq, &term_msg, sizeof(term_msg), CONFIG_WM8904_MSG_PRIO);
+      ret = mq_send(priv->mq, (FAR const char *)&term_msg, sizeof(term_msg),
+                    CONFIG_WM8904_MSG_PRIO);
       if (ret < 0)
         {
           int errcode = errno;
@@ -2028,7 +2031,7 @@ static void *wm8904_workerthread(pthread_addr_t pvarg)
 
       /* Wait for messages from our message queue */
 
-      msglen = mq_receive(priv->mq, &msg, sizeof(msg), &prio);
+      msglen = mq_receive(priv->mq, (FAR char *)&msg, sizeof(msg), &prio);
 
       /* Handle the case when we return with no message */