diff --git a/components/fatfs/vfs/vfs_fat.c b/components/fatfs/vfs/vfs_fat.c
index 169133a08a..4ae04c3d61 100644
--- a/components/fatfs/vfs/vfs_fat.c
+++ b/components/fatfs/vfs/vfs_fat.c
@@ -424,6 +424,7 @@ static ssize_t vfs_fat_write(void* ctx, int fd, const void * data, size_t size)
         if (res != FR_OK) {
             ESP_LOGD(TAG, "%s: fresult=%d", __func__, res);
             errno = fresult_to_errno(res);
+            _lock_release(&fat_ctx->lock);
             return -1;
         }
      }