diff --git a/drivers/sensors/mpu60x0.c b/drivers/sensors/mpu60x0.c
index 7705cda54d..a91d55cea2 100644
--- a/drivers/sensors/mpu60x0.c
+++ b/drivers/sensors/mpu60x0.c
@@ -654,22 +654,6 @@ static inline uint8_t __mpu_read_who_am_i(FAR struct mpu_dev_s *dev)
   return val;
 }
 
-/* Locks and unlocks the @dev data structure (mutex).
- *
- * Use these functions any time you call one of the lock-dependent
- * helper functions defined above.
- */
-
-static void inline mpu_lock(FAR struct mpu_dev_s *dev)
-{
-  nxmutex_lock(&dev->lock);
-}
-
-static void inline mpu_unlock(FAR struct mpu_dev_s *dev)
-{
-  nxmutex_unlock(&dev->lock);
-}
-
 /* Resets the mpu60x0, sets it to a default configuration. */
 
 static int mpu_reset(FAR struct mpu_dev_s *dev)
@@ -687,14 +671,14 @@ static int mpu_reset(FAR struct mpu_dev_s *dev)
     }
 #endif
 
-  mpu_lock(dev);
+  nxmutex_lock(&dev->lock);
 
   /* Awaken chip, issue hardware reset */
 
   ret = __mpu_write_pwr_mgmt_1(dev, PWR_MGMT_1__DEVICE_RESET);
   if (ret != OK)
     {
-      mpu_unlock(dev);
+      nxmutex_unlock(&dev->lock);
       snerr("Could not find mpu60x0!\n");
       return ret;
     }
@@ -751,7 +735,7 @@ static int mpu_reset(FAR struct mpu_dev_s *dev)
 
   __mpu_write_int_pin_cfg(dev, INT_PIN_CFG__INT_RD_CLEAR);
 
-  mpu_unlock(dev);
+  nxmutex_unlock(&dev->lock);
   return 0;
 }
 
@@ -776,9 +760,9 @@ static int mpu_open(FAR struct file *filep)
 
   /* Reset the register cache */
 
-  mpu_lock(dev);
+  nxmutex_lock(&dev->lock);
   dev->bufpos = 0;
-  mpu_unlock(dev);
+  nxmutex_unlock(&dev->lock);
 
   return 0;
 }
@@ -794,9 +778,9 @@ static int mpu_close(FAR struct file *filep)
 
   /* Reset (clear) the register cache. */
 
-  mpu_lock(dev);
+  nxmutex_lock(&dev->lock);
   dev->bufpos = 0;
-  mpu_unlock(dev);
+  nxmutex_unlock(&dev->lock);
 
   return 0;
 }
@@ -844,7 +828,7 @@ static ssize_t mpu_read(FAR struct file *filep, FAR char *buf, size_t len)
   FAR struct mpu_dev_s *dev = inode->i_private;
   size_t send_len = 0;
 
-  mpu_lock(dev);
+  nxmutex_lock(&dev->lock);
 
   /* Populate the register cache if it seems empty. */
 
@@ -877,8 +861,7 @@ static ssize_t mpu_read(FAR struct file *filep, FAR char *buf, size_t len)
       dev->bufpos = 0;
     }
 
-  mpu_unlock(dev);
-
+  nxmutex_unlock(&dev->lock);
   return send_len;
 }