diff --git a/tools/fs/files.ts b/tools/fs/files.ts
index d5538b0ba3..f8f9d7c891 100644
--- a/tools/fs/files.ts
+++ b/tools/fs/files.ts
@@ -1538,13 +1538,13 @@ export function readBufferWithLengthAndOffset(
   if (length > 0) {
     const fd = open(filename, "r");
     try {
-      var count = read(fd, data, 0, length, offset);
+      const count = read(fd, data, { position: 0, length, offset });
+      if (count !== length) {
+        throw new Error("couldn't read entire resource");
+      }
     } finally {
       close(fd);
     }
-    if (count !== length) {
-      throw new Error("couldn't read entire resource");
-    }
   }
   return data;
 }