1 files changed, 1 insertions, 1 deletions
diff --git a/tinyusb/class/msc_host.c b/tinyusb/class/msc_host.c
index e3eaf7993..9dc86e939 100644
--- a/tinyusb/class/msc_host.c
+++ b/tinyusb/class/msc_host.c
@@ -408,7 +408,7 @@ void msch_isr(pipe_handle_t pipe_hdl, tusb_event_t event, uint32_t xferred_bytes
       tusbh_msc_isr(pipe_hdl.dev_addr, event, xferred_bytes);
     }else
     { // still initializing under open subtask
-      osal_semaphore_post(msch_sem_hdl);
+      ASSERT( TUSB_ERROR_NONE == osal_semaphore_post(msch_sem_hdl), VOID_RETURN );
     }
   }
 }