diff --git a/lib/std/fs/File.zig b/lib/std/fs/File.zig
index be993895bc96be8c249e800739a8c170f67892cb..138807972ea17d0aafb6b16c3da2587940b3c832 100644
--- a/lib/std/fs/File.zig
+++ b/lib/std/fs/File.zig
@@ -1793,7 +1793,7 @@ pub const Writer = struct {
                 file_reader.size = file_reader.pos;
                 return error.EndOfStream;
             }
-            const consumed = io_w.consume(@bitCast(sbytes));
+            const consumed = io_w.consume(@intCast(sbytes));
             file_reader.seekTo(file_reader.pos + consumed) catch return error.ReadFailed;
             return consumed;
         }