diff --git a/src/ops/index.js b/src/ops/index.js
index 01cd292..ea85cac 100644
--- a/src/ops/index.js
+++ b/src/ops/index.js
@@ -397,10 +397,10 @@ export const upload_file =
         const default_buffer = Buffer.alloc(65536 * 2);
         while (remain > 0) {
           const to_write =
-              remain >= default_buffer.length ? default_buffer.length : remain;
-          const buffer = to_write == default_buffer.length
-                             ? default_buffer
-                             : Buffer.alloc(to_write);
+            remain >= default_buffer.length ? default_buffer.length : remain;
+          const buffer = to_write === default_buffer.length
+            ? default_buffer
+            : Buffer.alloc(to_write);
           fs.readSync(src_fd, buffer, 0, to_write, offset);
           const written = await dst.write(offset, buffer);
           if (written > 0) {