diff --git a/arch/renesas/src/rx65n/rx65n_usbhost.c b/arch/renesas/src/rx65n/rx65n_usbhost.c
index c30bd9434c..152d398fd7 100644
--- a/arch/renesas/src/rx65n/rx65n_usbhost.c
+++ b/arch/renesas/src/rx65n/rx65n_usbhost.c
@@ -8363,7 +8363,7 @@ struct usbhost_connection_s *rx65n_usbhost_initialize(int controller)
   /* Initialize semaphores & mutex */
 
   nxsem_init(&priv->pscsem,  0, 0);
-  nxmutex_lock(&priv->lock);
+  nxmutex_init(&priv->lock);
 
 #ifndef CONFIG_USBHOST_INT_DISABLE
   priv->ininterval  = MAX_PERINTERVAL;
diff --git a/fs/unionfs/fs_unionfs.c b/fs/unionfs/fs_unionfs.c
index 657becdcaf..d042abdbd0 100644
--- a/fs/unionfs/fs_unionfs.c
+++ b/fs/unionfs/fs_unionfs.c
@@ -2679,7 +2679,7 @@ errout_with_fs1:
   inode_release(ui->ui_fs[0].um_node);
 
 errout_with_uinode:
-  nxmutex_lock(&ui->ui_lock);
+  nxmutex_destroy(&ui->ui_lock);
   kmm_free(ui);
   return ret;
 }