diff --git a/README.md b/README.md
index bd31722..d23bbeb 100644
--- a/README.md
+++ b/README.md
@@ -2208,7 +2208,7 @@ Parse options are described in the [Parsing Options](#parsing-options) section.
 `XLSX.writeFile(wb, filename, write_opts)` attempts to write `wb` to `filename`.
 In browser-based environments, it will attempt to force a client-side download.
 
-`XLSX.writeFileAsync(wb, filename, o, cb)` attempts to write `wb` to `filename`.
+`XLSX.writeFileAsync(filename, wb, o, cb)` attempts to write `wb` to `filename`.
 If `o` is omitted, the writer will use the third argument as the callback.
 
 `XLSX.stream` contains a set of streaming write functions.
diff --git a/docbits/40_interface.md b/docbits/40_interface.md
index ac8f221..1dc197e 100644
--- a/docbits/40_interface.md
+++ b/docbits/40_interface.md
@@ -21,7 +21,7 @@ Parse options are described in the [Parsing Options](#parsing-options) section.
 `XLSX.writeFile(wb, filename, write_opts)` attempts to write `wb` to `filename`.
 In browser-based environments, it will attempt to force a client-side download.
 
-`XLSX.writeFileAsync(wb, filename, o, cb)` attempts to write `wb` to `filename`.
+`XLSX.writeFileAsync(filename, wb, o, cb)` attempts to write `wb` to `filename`.
 If `o` is omitted, the writer will use the third argument as the callback.
 
 `XLSX.stream` contains a set of streaming write functions.